Hi and Welcome.
There is a bug:
When I enter a table, then the table master invites me to the table I am in, and I press ctrl J while the game is running, the entire game freezes.

Hi. sorry, but what reason does the table master have to invite you while you're already there? and what reason do you have to press control plus J to join a table you're already in? I write this at the cost of being banned forever. But I seriously think the bug is somewhere else.

Besides, nothing actually freezes, you just have to press F11 to restore the list of cards/game elements again.

omeed:
I do not know.

Hello,

This bug will be fixed in the next server update. Thank you for signaling.