Poster frames don't work properly on Multicam sequences
Setting a poster frame on a Multicam clip often selects the wrong image. Took me a while, but finally figured it out.
Premiere only selects whatever is on Track 1 in the Multicam, rather than what is actually being shown in the thumbnail view (ie. the clip on the highest track).
Often there might not be anything on track 1 and your poster frame ends up being a black frame, not v helpful.
Please fix, thanks!