https://bugs.winehq.org/show_bug.cgi?id=37180
--- Comment #23 from GreatEmerald pastas4@gmail.com --- (In reply to Fabian Maurer from comment #22)
How do I test this issue with that runtime? Because I don't see anything obviously broken, it doesn't seem to require mouse input on the map.
You need to run System/UnrealEd.exe, then load the map, then right-click in the 3D viewport. A context menu should appear, but it doesn't.