Hey,
Have you checked cluster logs? As far as I know, you should manually Failover to another node of your cluster. Might help:
https://serverfault.com/questions/1095480/stretch-cluster-file-server-with-storage-replica-partnership-not-reversing-on
As another option, you can use StarWind VSAN to configure replication between your nodes and achieve automatic failover.
https://www.starwindsoftware.com/starwind-virtual-san
Cheers,
Alex Bykovskyi
StarWind Software
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