https://bugs.winehq.org/show_bug.cgi?id=44843
--- Comment #5 from Alexandre Julliard julliard@winehq.org --- For instance if you run with WINEDEBUG=warn+cursor and move the pointer into the window border you'd see something like:
003b:warn:cursor:create_xcursor_system_cursor no system cursor found for L"user32.dll,32645" mapped to "ns-resize"
This means that your cursor theme doesn't contain the "ns-resize" cursor. You could then add a registry value like this:
[HKCU\Software\Wine\X11 Driver\Cursors] "user32.dll,32645"="top_side"
to remap it to some other cursor that exists in your current theme.
But if you can, please test with current git first, hopefully you won't need to do the remapping by hand anymore.