Stock instrument Display issues (White border within plugin)

As per this image, the plugin loads with a white border inset top and left side, almost like the main interface has shifted downwards and to the right:-

This only occurred after i disabled ‘Always on top’ for plugins, if i turn that back on they’re fine.

Running C10.5.20 Build 179 - just curious if anyone else having the same issues or if i should look into trashing prefs/reinstalling or something.

I also noticed that the on-screen keyboard stops responding when dragging patches from the media bay, so you have to close the keyboard and open it again. Again, not sure if this is a C10.5.20 bug or i have an underlying issue here and just a coincidence these two issues appeared last night.

Thanks in advanced if anyone can confirm.