EA community manager confirmed that
DICE fixed connection issues
!
https://forums.ea.com/discussions/battlefield-2042-technical-issues-en/breakthrough-returns-to-main-menu-after-match-found/13359322?topicRepliesSort=postTimeDesc
UPD May 30: OKAY it work on few days and then again issue returned to all. YOU CAN REPORT IT BY LINK ABOVE. Community Manager is still on that thread on EA Forums and you can help him by reporting problem as he write at the message that marked as solution