Chroma Key crashes

I have 2 video tracks. I add the chroma key simple filter to the top track. As soon as I set the top track to composite Shotcut crashes.

No filters applied to the tracks, except chroma to the top track.
Version 18.05.18, portable
Windows 10 Pro 1703

I tried different videos, same behaviour for all of them.

Any idea?

Is GPU Processing (experimental) enabled? If so, disable it, 'cose it’s ‘experimental’… :wink:

Thank you very much. Disabling GPU Processing did the trick.