Solution for Client.InsufficientFreeAddressesInSubnet - Task Placement for EventBridge Scheduled Task on Fargate

I have a VPC with 3 private subnets each with 20 total IP addresses. We have an ALB and an NLB and a Fargate ECS Cluster with ~14 micro-services that run in our private subnets. We are running into a situation where one of our 3 private subnets is down to 0 free IP addresses, the others have about 5 free each. We also have 3 EventBridge Scheduled tasks that I run staggered, midnight, 1 AM and 2 AM, to avoid IP address competition. For some reason the tasks are being placed in the subnet with 0 free IP addresses and we get the error Client.InsufficientFreeAddressesInSubnet. Documentation states that Task placement strategies and constraints aren't supported for tasks using the Fargate launch type. Apart from creating a new VPC with larger Private subnets, is there a temporary solution that I can implement? I'm also getting this error when our other Fargate tasks try to auto-scale up. Long term we are going to instantiate a new VPC but our Cloud Team has to do that, so while we wait I was exploring other options.