lobby bug delay

hello. i have weird problem with #lobby in league of legends it started month ago, accept button shows after a #delay like 20sc when the party already #declined , invite party or friends is delayed too , sometimes cant even cancel the #queues even when the game was declined, so i tried everything with chatgpt u could imagine even contacted riot support and followed every step but nothing. then i formatted my pc and it fixed the problem for like 2 weeks but yesterday same problem appears.... any solutions ty