Using Paramount Plus downloader. Video was playing, browser was indicating "downloading" with animated arrow into basket, but downloaded clock was not advancing (00:00:00), neither in the banner timer, nor in the queue timer. Using "High Speed" timer selection.
This happened on a movie. I simply cancelled the movie and started it again, and it successfully seemed to recognize the beginning and started the clock when then the movie started.
This also happened on a series. A whole episode (the 6th in the queue) did not start the clock when the video started. I waited for the episode to end to see what would happen. The result is that Paramount moved on to the 7th episode, but DRM Downloader is recording it as the 6th episode metadata (e.g. recording video of S01E07 into S01E06). Unsure if it will mismatch the subtitles or not...I'm hoping it is just the name of the "container" (filename) that is off. This will probably result in a title/episode mismatch to the remainder of the queue. I will keep the queue going for one more episode to experiment.
Unsure if this is related to the DRM Downloader's attempt to recognize and skip commercials (I am on the Paramount Plus commercials plan).