http://bugs.winehq.org/show_bug.cgi?id=57569
--- Comment #9 from Ivo Ivanov logos128@gmail.com --- BeamNG has always worked correctly with UseTakeFocus = 'Y'. In any case I tested it with the latest master 647004cd5d7ee93ad8b53abb8939da87be3e25a0 and it worked without any issues (d3d11, fullscreen).
Tested UseTakeFocus = 'N' as well, and it also worked without any issues. Not sure if the mentioned commit has fixed it, or something else. I'll look into it when time permits.