Confirmed on 4.11-1, game does start the second time as zzhiyi says Framerate felt pretty low though, although I have no idea if it's a proton-specific issue.
When game is "started" proton log repeat this line: `50931.802:0008:0029:err:ntdll:RtlpWaitForCriticalSection section 0x7bceab20 "/home/proton/proton/wine/dlls/ntdll/loader.c: loader_section" wait timed out in thread 002...