Changing access list stops NFS server

DSS v1.32

I have about 20 shares with NFS access enabled.
Each share has its own "NFS share access" list.

I modify one of the lists, add a new host to it, for example
and after I click on Apply button the NFS server on DSS stops
completely.

No one can get access to NFS shares on DSS at all.
An attemp to mount NFS share from DSS gives an error:
nfs mount: dss01:/Catia: No such file or directory

Resetting connections or network interfaces does not help.

I have to reboot DSS. After reboot everything is working again.