It does take much longer to analyze.
But after testing a few movies, it seems it needs to play the ad while analyzing and other times no need to play the ad to analyze.
Processing after download can be slow as well. As well as analyzing can be slow in download queue.
But Peacock is working for me, maybe try clearing temp folder?
Locked as it must be a local issue, and no more details ever provided.
Also, could not be reproduced, nor were there other reports.