MinimServer 2.2 update 245 vs DSM 7.2.1-69057 Update 3 issues

[MiniMe]

Thanks for the quick reply.

Some example behaviour:
case 1) iPhone app that auto lists available DLNA devices shows Diskstation Media Server and Minimserver side by side when all is up and running. When browse/listen via Minimserver all can go perfectly well but sometimes music stops and when re browsing available DLNA servers only Diskstation Media Server is left (and Minimserver gone).

case 2) Network player that plays from Miniserver and can playback at all times, even when Minimserver is showing as unavailable (but Synology running). The control app in such case shows Minimserver (offline) but playback continues. When in such case opening another app (e.g. as in case 1) Minimserver is in that app normally showing as available (and can browse/listen etc).

case 3) Mac computer (when issue has happened) has MinimWatch showing a grey icon and (test app) Linn Kazoo is not showing the library. When going into Minimserver IP and performing Rescan, MinimWatch then still shows grey icon and in Kazoo the library pops up perfectly (and can browse/listen etc).

Restarting network does not resolve the issue, but restarting Diskstation makes Minimserver show up again, that is, until it's gone again?
Issue is appearing since last few weeks with no change in computer, nas, or player except all here and there got their most recent updates.

Seen the issue a number of times where restarting Diskstation always was the clue to resolve, until it's gone again. Restarting network etc has no impact. Unsure how to monitor or reproduce. It does not happen super frequently.