Shot some variable rate frames.
Canon 1280p 60fps, in ML set 2048 @2.39, dialed fps to 30 fps, 3X crop, the number of frames was fine for 30 fps.
So I continued and dialed to 12 fps, but notice via number of frames the lowest it could shoot was 20 fps.
I tried 6 fps, but again the lowest via number of frames was 20 fps.
So the bug is the min. fps, is 20, as it wont go slower.
Ideally we want to hit 12fps, as that's the min. acceptable for frame interpolation if you want to recover to 24 fps.
I suspect one could recover to 2K video @ 24fps, with a 12fps we should get 2K continuous. Presently at 20 fps, its 13 sec. before frame skips.