https://bugs.winehq.org/show_bug.cgi?id=41544
--- Comment #7 from xkendy@gmail.com --- Thx Alex and Michael to try find this bug. This is version specific bug. It's only happen when I use wine version 1.9.20-staging, but not earlier. From my side (I'm a layman on coding wine) is error on new patch(es), that wine team used for build 1.9.20-staging and this patch(es) isn't on 1.9.19-st. or earlier. Therefore, I think that this mentioned patch (SC_KEYMENU) not causing the problem with losing focus from the game after pressing L-ALT.
To be precise: "L-ALT" I mean Left ALT. With not any other combination keys. L-ALT is one of inbattle WOT keys. Sorry for disinformation.
Alex: I tried run WOT with desktop emulated window and L-ALT problem is not present. Mouse is locked in emulated window and work correctly. Can you please try run tests in non emulated mode ? As Michael wrote: "You can test it directly in the login screen", yes here is happend too.