Bridge cards aren't displaying, and toggle themselves off

MacOS Monterey + TB 11.5 My internet connection is not censored.

While updating articles I was testing the Connection Assist. And at some point I removed the bridges from the list and tried to add new ones obtained from the bot. And somehow now I don't see my bridges:

even if I push "show my bridges" button.

I tried

• Close TB and open it again (nothing changed),
• removing bridges and adding them anew - the same picture.

When I choose another option - like using built-in bridges - my manually added bridges are being deleted.

And one more thing - If I choose to use bridges, when I close the Connection assist tab and then visit it again - "Your current bridges" menu is switched off.