Unable to rejoin Competitive matches

When I play competitive (or at least try to), I often get the ‘‘Match Found’’ notification, but then I’m stuck in the main menu with the ‘‘Rejoin match’’ instead of the ‘‘Play’’ selection. Clicking on ‘‘Rejoin match’’ doesn’t do anything. If I manage to restart the game under a minute, I can join the game and then the match ends because of the ‘’ A player left the match’’. It’s been happening for a few weeks now, and thought I could just stop playing and wait for the next patch, hoping for a fix. Now I’m banned for very long period of times, because I got this issue multiple times already and lost over a hundred SR. I’m sticking with QP for now (not much of a choice), since I never got this issue in QP yet.

I’ve seen on the forums the same issue being metnionned a few times already, but never found a fix.

By the way, I’m on a wired connection with a single device connected to the router, so I highly doubt it’s an issue coming from my local network.

Here’s the WinMTR:

WinMTR Statistics

WinMTR statistics

Host % Sent Recv Best Avrg Wrst Last
192.168.1.1 0 144 144 0 0 5 0
10.55.13.1 0 144 144 6 10 17 9
No response from host 100 28 0 0 0 0 0
No response from host 100 28 0 0 0 0 0
0.xe-5-2-0.er2.mtl3.yul.ebox.ca 2 136 134 11 14 19 15
motl-b1-link.telia.net 0 144 144 11 14 40 13
toro-b1-link.telia.net 0 144 144 18 22 62 19
chi-b21-link.telia.net 0 144 144 28 31 47 33
blizzard-ic-348622-chi-b21.c.telia.net 0 144 144 29 36 91 31
ae1-br02-eqch2.as57976.net 0 144 144 28 35 89 32
be2-pe02-eqch2.as57976.net 1 140 139 0 30 40 33
24.105.62.129 1 140 139 0 31 42 29

Here are some posts with a very similar issue: