ShadowManager encountering issues and shutting down IPC service

I am facing an issue where it seems that the ShadowManager is encountering some issues, and shutting down the IPC service I believe. I haven't had this issue before, and it only came when I added the ShadowManager.

After a little while, when it shuts it down, other components that need IPC are no longer able to subscribe to topics.

I've got the below from the greengrass.log

2023-05-04T18:42:48.323Z [INFO] (pool-2-thread-48) com.aws.greengrass.tes.TokenExchangeService: TokenExchangeService is shutting down!. {serviceName=aws.greengrass.TokenExchangeService, currentState=STOPPING}
2023-05-04T18:42:49.327Z [INFO] (pool-2-thread-48) com.aws.greengrass.tes.TokenExchangeService: Stopped server at port 43297. {serviceName=aws.greengrass.TokenExchangeService, currentState=STOPPING}
2023-05-04T18:42:49.328Z [INFO] (aws.greengrass.TokenExchangeService-lifecycle) com.aws.greengrass.tes.TokenExchangeService: service-set-state. {serviceName=aws.greengrass.TokenExchangeService, currentState=STOPPING, newState=FINISHED}
2023-05-04T18:43:03.109Z [ERROR] (aws.greengrass.ShadowManager-lifecycle) com.aws.greengrass.shadowmanager.ShadowManager: service-errored. {reason=Timeout in shutdown, serviceName=aws.greengrass.ShadowManager, currentState=STOPPING}
2023-05-04T18:43:03.110Z [INFO] (aws.greengrass.ShadowManager-lifecycle) com.aws.greengrass.shadowmanager.ShadowManager: service-set-state. {serviceName=aws.greengrass.ShadowManager, currentState=STOPPING, newState=ERRORED}
2023-05-04T18:43:03.115Z [WARN] (pool-2-thread-12) com.aws.greengrass.deployment.IotJobsHelper: Interrupted while subscribing to Iot Jobs descriptions topic. {ThingName=DOWNSTAIRS-TESTBENCH-2}
2023-05-04T18:43:03.116Z [WARN] (FleetStatusService-lifecycle) com.aws.greengrass.status.FleetStatusService: service-state-transition-interrupted. Service lifecycle thread interrupted. Thread will exit now. {serviceName=FleetStatusService, currentState=FINISHED}
2023-05-04T18:43:03.116Z [WARN] (aws.greengrass.SecretManager-lifecycle) com.aws.greengrass.secretmanager.SecretManagerService: service-state-transition-interrupted. Service lifecycle thread interrupted. Thread will exit now. {serviceName=aws.greengrass.SecretManager, currentState=FINISHED}
2023-05-04T18:43:03.114Z [WARN] (pool-2-thread-13) com.aws.greengrass.deployment.ShadowDeploymentListener: Interrupted while subscribing to device shadow topics. {}
2023-05-04T18:43:03.116Z [ERROR] (pool-2-thread-38) com.aws.greengrass.shadowmanager.sync.CloudDataClient: cloud-data-client-subscription-error. Failed to update subscriptions. {}
java.lang.InterruptedException
    at java.util.concurrent.CompletableFuture.reportGet(Unknown Source)
    at java.util.concurrent.CompletableFuture.get(Unknown Source)
    at com.aws.greengrass.mqttclient.MqttClient.subscribe(MqttClient.java:410)
    at com.aws.greengrass.shadowmanager.sync.CloudDataClient.subscribeToShadows(CloudDataClient.java:260)
    at com.aws.greengrass.shadowmanager.sync.CloudDataClient.lambda$updateSubscriptions$1(CloudDataClient.java:173)
    at com.aws.greengrass.util.RetryUtils.runWithRetry(RetryUtils.java:50)
    at com.aws.greengrass.shadowmanager.sync.CloudDataClient.updateSubscriptions(CloudDataClient.java:171)
    at com.aws.greengrass.shadowmanager.sync.CloudDataClient.lambda$updateSubscriptions$0(CloudDataClient.java:139)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

2023-05-04T18:43:03.117Z [WARN] (pool-2-thread-47) com.aws.greengrass.shadowmanager.sync.strategy.BaseSyncStrategy: sync. Interrupted while waiting for sync requests. {}
2023-05-04T18:43:03.119Z [INFO] (pool-2-thread-47) com.aws.greengrass.shadowmanager.sync.strategy.BaseSyncStrategy: sync. Finished processing sync requests. {}
2023-05-04T18:43:03.117Z [WARN] (pool-2-thread-42) com.aws.greengrass.mqttclient.MqttClient: Shutting down spooler task. {}
2023-05-04T18:43:03.122Z [INFO] (pool-2-thread-25) com.aws.greengrass.shadowmanager.sync.strategy.BaseSyncStrategy: sync. Stop syncing. {}
2023-05-04T18:43:03.123Z [INFO] (pool-2-thread-25) com.aws.greengrass.shadowmanager.sync.strategy.BaseSyncStrategy: sync. Cancel 1 sync thread(s). {}
2023-05-04T18:43:03.131Z [INFO] (Serialized listener processor) com.aws.greengrass.lifecyclemanager.KernelLifecycle: executor-service-shutdown-initiated. {}
2023-05-04T18:43:03.130Z [WARN] (pool-2-thread-13) com.aws.greengrass.mqttclient.MqttClient: Failed to run MQTT spooler. {}
java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@3df83b86 rejected from java.util.concurrent.ThreadPoolExecutor@66954c7d[Shutting down, pool size = 2, active threads = 2, queued tasks = 0, completed tasks = 163]
    at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.reject(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.execute(Unknown Source)
    at java.util.concurrent.AbstractExecutorService.submit(Unknown Source)
    at com.aws.greengrass.mqttclient.MqttClient.triggerSpooler(MqttClient.java:427)
    at com.aws.greengrass.mqttclient.MqttClient.publish(MqttClient.java:524)
    at com.aws.greengrass.mqttclient.WrapperMqttClientConnection.publish(WrapperMqttClientConnection.java:96)
    at software.amazon.awssdk.iot.iotshadow.IotShadowClient.PublishGetNamedShadow(IotShadowClient.java:425)
    at com.aws.greengrass.deployment.ShadowDeploymentListener.publishToGetDeviceShadowTopic(ShadowDeploymentListener.java:310)
    at com.aws.greengrass.deployment.ShadowDeploymentListener.lambda$setupShadowCommunications$2(ShadowDeploymentListener.java:209)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

2023-05-04T18:43:03.133Z [INFO] (Thread-1) com.aws.greengrass.lifecyclemanager.KernelLifecycle: Waiting for executors to shutdown. {}
2023-05-04T18:43:03.133Z [INFO] (Thread-1) com.aws.greengrass.lifecyclemanager.KernelLifecycle: executor-service-shutdown-complete. {executor-terminated=false, scheduled-executor-terminated=true}
2023-05-04T18:43:03.136Z [INFO] (Thread-1) com.aws.greengrass.lifecyclemanager.KernelLifecycle: context-shutdown-initiated. {}
2023-05-04T18:43:03.136Z [ERROR] (Thread-4) com.aws.greengrass.mqttclient.MqttClient: Error subscribing. {topic=$aws/things/DOWNSTAIRS-TESTBENCH-2/jobs/$next/namespace-aws-gg-deployment/get/accepted}
java.util.concurrent.CompletionException: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@5bfdc9e rejected from java.util.concurrent.ThreadPoolExecutor@66954c7d[Shutting down, pool size = 10, active threads = 3, queued tasks = 0, completed tasks = 162]
    at java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source)
    at java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source)
    at java.util.concurrent.CompletableFuture.uniApply(Unknown Source)
    at java.util.concurrent.CompletableFuture$UniApply.tryFire(Unknown Source)
    at java.util.concurrent.CompletableFuture.postComplete(Unknown Source)
    at java.util.concurrent.CompletableFuture.complete(Unknown Source)
    at software.amazon.awssdk.crt.AsyncCallback$1.onSuccess(AsyncCallback.java:27)
    at software.amazon.awssdk.crt.mqtt.MqttClientConnection.onConnectionComplete(MqttClientConnection.java:138)
Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@5bfdc9e rejected from java.util.concurrent.ThreadPoolExecutor@66954c7d[Shutting down, pool size = 10, active threads = 3, queued tasks = 0, completed tasks = 162]
    at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.reject(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.execute(Unknown Source)
    at java.util.concurrent.AbstractExecutorService.submit(Unknown Source)
    at com.aws.greengrass.shadowmanager.sync.CloudDataClient.updateSubscriptions(CloudDataClient.java:139)
    at com.aws.greengrass.shadowmanager.ShadowManager.startSyncingShadows(ShadowManager.java:553)
    at com.aws.greengrass.shadowmanager.ShadowManager$1.onConnectionResumed(ShadowManager.java:114)
    at com.aws.greengrass.mqttclient.CallbackEventManager.runOnInitialConnect(CallbackEventManager.java:49)
    at com.aws.greengrass.mqttclient.AwsIotMqttClient.lambda$connect$7(AwsIotMqttClient.java:246)
    ... 6 more

2023-05-04T18:43:03.138Z [ERROR] (Thread-4) com.aws.greengrass.mqttclient.MqttClient: Error subscribing. {topic=$aws/things/DOWNSTAIRS-TESTBENCH-2/tunnels/notify}
java.util.concurrent.CompletionException: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@5bfdc9e rejected from java.util.concurrent.ThreadPoolExecutor@66954c7d[Shutting down, pool size = 10, active threads = 3, queued tasks = 0, completed tasks = 162]
    at java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source)
    at java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source)
    at java.util.concurrent.CompletableFuture.uniApply(Unknown Source)
    at java.util.concurrent.CompletableFuture$UniApply.tryFire(Unknown Source)
    at java.util.concurrent.CompletableFuture.postComplete(Unknown Source)
    at java.util.concurrent.CompletableFuture.complete(Unknown Source)
    at software.amazon.awssdk.crt.AsyncCallback$1.onSuccess(AsyncCallback.java:27)
    at software.amazon.awssdk.crt.mqtt.MqttClientConnection.onConnectionComplete(MqttClientConnection.java:138)
Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@5bfdc9e rejected from java.util.concurrent.ThreadPoolExecutor@66954c7d[Shutting down, pool size = 10, active threads = 3, queued tasks = 0, completed tasks = 162]
    at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.reject(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.execute(Unknown Source)
    at java.util.concurrent.AbstractExecutorService.submit(Unknown Source)
    at com.aws.greengrass.shadowmanager.sync.CloudDataClient.updateSubscriptions(CloudDataClient.java:139)
    at com.aws.greengrass.shadowmanager.ShadowManager.startSyncingShadows(ShadowManager.java:553)
    at com.aws.greengrass.shadowmanager.ShadowManager$1.onConnectionResumed(ShadowManager.java:114)
    at com.aws.greengrass.mqttclient.CallbackEventManager.runOnInitialConnect(CallbackEventManager.java:49)
    at com.aws.greengrass.mqttclient.AwsIotMqttClient.lambda$connect$7(AwsIotMqttClient.java:246)