@Anton L I found another bug. I commented on github issue, but putting here as well.

Messenger block does not work when loaded through HTMX.

Reproduce:

Add Messenger block to Group main page.

Goto Group main page -> Switch to Info -> Switch back to Group main page.

The messenger block doesn't reconnect and activate, so the typing area stays minimized.

* I have been using HTMX exclusively, and after the page title bug and this one, I would say it is ready for production.