Thanks for clarifying.
I agree we dont have a precise root cause.
This is a discussion forum thread, it’s not a commercial support case. Plus the effort most people would require to setup an env to reproduce your issue is simply too great, I’ve already tried but the “simplest” steps to reproduce would require me to spin up an k8s cluster, setup EFS, …. It’s, sorry, not gonna happen for the majority of forum contributors. As your setup is a bit niche, the issue you have hit is likely not impacting a lot of users …
You can try help yourself by tracing syscalls and trying to learn from that, keep trying to simplify things more, hope for a eureka contribution or for someone else to invest more time and respond - but you have no SLA here. Thats why I mentioned the age of the thread, 16 days, how long are you prepared to wait? Put another way, if this was blocking me, I’d also be looking for other ways forward too, so I hope you are doing that.