EC2 File Gateway with ephemeral storage after stop/start cycle

Hello,

I'm trying to use a File Gateway for our latest project. I'm launching an i3.4xlarge and using the NVME SSD ephemeral storage for the cache. It sets up okay and we can create and mount the share. If I stop and start the File Gateway instance, this is no longer the case -- I can access the instance, but the File Gateway is marked offline and I cannot mount the share. This is not the case when using an EBS volume for the cache, instead of the ephemeral storage.

I'm aware of the requirements around preventing data loss when using ephemeral storage on a gateway, but in this instance I don't care -- I specifically care about what appears to be a loss of configuration across stop/start cycles. Is there a solution to this please?

Thanks!