Martin,
There is quite a known issue with some CM projectors which the shutter opens and closes multiple times while the projector is still showing content. this is repeatable and happens often when the projection size is small.
A number of people on this forum and on facebook experience the issue. I spoke with Pangolin about it at ILDA last year and was told this is a known issue with the Kvant scan fail boards.

Originally Posted by
Pelikan
To be honest, I myself don't know what is that known issue, but the scan fail is now driven by FB4 board and most of the circuits were re-designed and made better. We tested everything extensively so there shouldn't be any surprises.
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.