When Media 100 separated the subsampler from the edit suite in version 7 and made that window scalable, that scaling was done on the host cpu, and on a slower machine it could drop frames.
With 8.2 i believe they allowed the subsamplers to scale even larger, and WILL drop frames at the largest setting. When this happens, a yellow indicator will be present (in the lower LH portion of the viewer). If you click that indicator the viewer will resize to the point that frames will no longer drop. Often too small to be workable…
I’ve found that I have to find a compromise between an occasional dropped frame in the subsampler and a viewer size that I can deal with.
It’s important to note that only the display in the subsampler is dropping frames, not the actual playback, so you can always trust the output to your client monitor
Hope this helps
~A.D.