Hi As I have reported I have the same problem, but
If you are waiting after the frozen screen, than a certain time, it tries to step back to the garage, and than it jumps to the connection screen and saying fail to connected.
so in my opinion something interrupts the server conection and therefore the frozen screen after the battle.
it could be WG problem or also XVM or othe mod which is need to connect after the battle and disturbing the connection to WG server
It doesnt matter on which server i was playing. EU1 or EU2
MAybe this information was useful to solve this issue if it is your concern.
Thanks to solve if you can
Regards