SR not working: stale NFS handle

[djingo]

I have a SR as NFS share on an unRAID NAS, which I used for backup health checks (restore and start VM).
The problem with this is that I get:

SR_BACKEND_FAILURE_47(, The SR is not available [opterr=[Errno 116] Stale file handle: '/var/run/sr-mount/redacted], )
how may I avoid this?

(I am not using the internal NVME for health checks so that it lives longer)

[iLix]

@djingo
Have you made any config changes to unraid? That will often make nfs go stale.