Recently (mainly after the last big update before the season) I have sometimes problems joining servers, especially in COTD.
This happen just now again after qualifier, I was not able to join the KO servers, always getting the "UDP connection failed" message.
When rejoining TA server it woked 1 out of 3 connection attempts, but when trying to rejoin KO server from there it always failed.
This happen already 5 or 6 time since the big december update. I haven't had this problem the 2 years before since I play TM.
IT's not a problem with my internet connection, everythings else and other games work fine, this happens only in TM.