[CLIENT} Can't go in my party after finishing a game

Basically, I'll sometime finish a game and when I click on play again, I'll end up in a situation where I cant access the party tab anymore. I'd want to quit the party and remake one but I cant quit the party without entering the party tab. So then I try restarting my client but the client won't load. I'll get the small window informing me that the launcher isnt responding anymore and can either close it or wait (and if I wait, nothing happens.)

It doesnt happen every time I finish a game though. I dont know what causes it, is it just my computer?

If I restart my computer, it takes while for the client to restart because it repairs itself and need to update/load but yeah...Otherwise, it's fine afterwards. But Im still reporting it because its a pain not being able to play another game immediately after.

I hope you can help me :)