Plex slow to start playing uncached file; lots of "list: cached object"

[Animosity022]

See this:

Dir-cache-time vs poll-interval

poll-time is how often rclone asks drive “have you got any changes?”. dir-cache-time is how long rclone is willing to keep directory entries around before deciding they are too old and discarding them. You likely want to set dir-cache-time high, or infinite and the poll time lower (say 1 minute).

Give it a try and see if it works for you.