signal-desktop not working

Hello.

Is anyone able to use signal-desktop?

7.72 (from 2025Q4) used to work, but "died" due to protocol obsolescense.

7.84 (from 2026Q1):
_ doesn't receive new messages;
_ eventually "chat session refreshed" will appear under each contact 
that has new messages (which I see from my phone);
_ sent messages are stuck there; they never leave my computer;
_ if I clean everything up and start over, it will sync everything up to 
now, but then stay frozen at that point in time.

Is this an upstream problem? A port problem? My problem?
Any hint on how to debug this?
"chat session refreshed" is the only useful keyword I have for a search, 
but it points to some bugs which are all deemed as closed.

  bye & Thanks
	av.

P.S.
I'm on 14.3/amd64.