Cannot see Minimserver anymore for UPNP/DLNA

[streamer99]

I seem to be having a similar problem to the OP. I have used minim server on a Synology DS1819+ for several years. The current DSM version is 7.2.2-72806 update 3.
It has always been a rather hit and miss situation as to whether minimserver would be visible to the ios control point, in my case usually mconnect on ios 18.3.1
More than once I have considered giving up minim server because of this - I usually have to manually request a rescan before I can make any streaming selection, sometimes 2 or 3 times.
Probably since the latest update of DSM a few days ago, performance has been the worst I have experienced with contact lost in a few minutes so one must rescan again before anything can be seen.
As I understand it, there are no minim server settings the user can appropriately adjust to help. My router and WAP have IGM snooping off.