Just found my way to this thread because my dad told me that for the last week he has been getting “too many streams in use” error. He isn’t actually playing anything, but it occurred to me he is the only user I allow downloads for, and he has been using the feature lately.
He just called me finally after a week saying this was going on and I have absolutely not a single person streaming right now even though he was getting the error. There is NO REASON why he should be seeing “too many streams in use” I saw Plex had an update so I let it apply which restarted my server and it’s working for him again now. I disabled his downloads.
My guess is that this bug, whatever it is, was causing a traffic jam with the downloads feature for his user account. Whatever gets locked up probably reporting to the server and causing the max stream amounts to read over limit.
Not grabbing any logs because I can already tell Plex is in IDGAF mode for this one. Hopefully my post here serves as helpful for someone else having this issue and going WTF?
Looks like everyone should be disabling and not using downloads going forward because they seem to be driving it into the same ditch they drove Plex Sync into.