MinimServer 2: No rescan from control point

[Audiophiliac]

Hello all.
Setup: Synology DS416play + BubbleUpnp + MinimServer 2

So far, MinimServer 0.8 worked without any issue since several years with old Synology system DSM 6.x.x

I updated yesterday from Synology system DSM 6.x to DSM 7.1.1.
Java8 is not compatible with DSM 7.x, hence MinimServer 0.8 cannot be used anymore and then I updated to MinimServer 2.1.2 update 218.

The server works fine, but I lost 3 of my preferred functionalities:
1. Artist.reverseName.display does not work anymore: ''Name, Firstname'' is swapped to ''Firstname Name''
2. Comment.display does not work anymore: I store additional information about tracks in this field (recording place, date, media source, etc.)
3. The rescan of the library from the control point does not work anymore

The first 2 points seems to be solved by paying a rental fee.

The third one seems to be an issue, since touching the "rescan library" from BubbleUpnp on MinimServer (3 dots) setup does not have any effect, as it was previously. Nothing happens.

While the rescan works fine using MinimWatch on the PC, after a minor change in the library, the rescan is rather fast as it was with MinimServer 0.8 + BubbleUpnp, but you need to have your PC switched on do perform that.

Does anybody have the same experience? And possibly a solution.

Regards.