I found the problem. It's IPv4 routing to the servers. When using IPv6 tunneling, everything stays good and you can play in all game modes. However for me program, that gives IPv6 tunnel, work only with VPN, the ping increases from 60 to 95, which is very uncomfortable to play with. Maybe for you this program will work without VPN, you can try, just find Cloudflare WARP.
I don't think this problem is related to that. I tried logging in from another account, and UT runs without any problems there.
For me it's exactly bad IPv4 connection, because when I start play through IPv6, I didn't have no one disconnect to servers.
Check my post this is definitely not a server connection issue. You can use another ea account and connect to UT fine on the same pc or console using the same connection
