Reaper64 (4.32rc1 and also 4.31) is drawing GUIs incorrectly for certain 64bit VST plugins (the equivalent AU draws fine)... examples:
The black bar at the top is supposed to be at the bottom of UAD plugin windows... it also obscures the native Reaper menus (presets, the + menu, the Param button, etc) which you can only access if you drag the window to the side to expand the window width:
This behaviour is also displaying on the recently-released u-he 64bit VST 2.4 plugins:
GUI is shifted up so that the top Reaper menus are obscured, again forcing you to manually resize the window to get access to them:
Other 64bit VST 2.4 plugins draw OK so it must be something about the way Reaper64 handles these particular plugins