Anyone using FL Studio on Mac having this issue? After displaying the SampleTank 4 UI for the first time, whenever I leave the UI (minimize the VST, change tabs in the VST wrapper, etc.) the pianoroll seems to have UI redraw issues. Once the ST4 UI is re-displayed, the issue is resolved. I've already contacted IK Multimedia and Image-Line support. Just wondering if any other FLS users have seen this. While the workaround is simple, ST4 takes up a lot of screen real estate.
See the example video.