This is painful, and hearing that downgrading PMS warrants a response from Plex.
Oh Plex team…
edit: I experience this in Chrome and Firefox.
And here it is, it just completely stops even bothering to try to load new segments.
And in the console, I see a lot of suspicious errors:
XML Parsing Error: no root element found
Location: https://192-168-1-35.45728c13cb4d403e9c12ed91d1d57552.plex.direct:32400/player/proxy/poll?deviceClass=pc&protocolVersion=3&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1&X-Plex-Product=Plex%20Web&X-Plex-Version=4.72.0&X-Plex-Client-Identifier=j9p92oyx0bl0hzqta4366l5b&X-Plex-Platform=Firefox&X-Plex-Platform-Version=95.0&X-Plex-Sync-Version=2&X-Plex-Features=external-media%2Cindirect-media&X-Plex-Model=hosted&X-Plex-Device=Linux&X-Plex-Device-Name=Firefox&X-Plex-Device-Screen-Resolution=2277x942%2C5160x2160&X-Plex-Token=redacted&X-Plex-Language=en
For those who can resolve the video playback issue by downgrading plexmediaserver from 1.25 to 1.24, I believe Plex Web stops buffering after 2 mins causing playback to stop is related. Others in that thread have observed the same.
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Sigh. And again I’m reminder why I avoid closed source software like the plague - even my exceptions come back to eventually pain me. And not even an ack or a bug tracker to sniff at. 
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Another update (1.25.3.5409) and still no response, resolution or even a “we are working on it” from the Plex team. First post was 6 months ago. What is going on with the developers? They had time to put in enhancements but no time to resolve a well documented issue. Is it appropriate to rely on your user base to roll back their Plex server installation to a previous version? This does not put the developer and management team for Plex into a good light.
I have this problem. Using Ubuntu 20.04 server on 11th Gen Intel NUC (which was a PITA to get working on it’s own). Recently upgraded server so thought this issue was related to new hardware/server install. I downgraded to the latest 1.24 and now Chrome (Edge) playback works.
Also can confirm that reverting to 1.24.5.5173 on Debian linux resolves the issue playing via browser.
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Same thing happening to me for the last 6 months. I start using the Windows 10 Plex app from the Microsoft Store. Then will try web after a while. Very random and VERY frustrating…
Same issue here…
I’ve been binge watching a tv show for the past few hours and now all of a sudden the playback stops every, and I mean EVERY, 2 minutes… have restarted all machines involved, switched from wifi to lan cable and same thing…
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Exact same for me, If I back up I can watch untill the point where the stream died…
Same problem on latest Plex version: 1.25.6.5577
I didnt see any log files posted. Attached are my sanitized logs for the issue
plex-logs.zip (36.4 KB)
Seems to stop playing on MKV files but the MP4s are doing OK
Can we please have some official Plex staff reply on this? This is a WAY overdue fix for something YOU broke. As paying customers, we are entitled to a bit more than having to run workarounds ourselves.
I cannot always have a 3rd party client when on the go and rely on browser playing
Seems like I’m a bit late to the party. Noticed the issue yesterday, but haven’t been using my Plex in a while.
Because it’s not mentioned in this thread: For me, the stream continues as if nothing happened if I skip ahead to the next episode, and then jump back to the previous one - it continues right where I left off.
I guess the question is: Is that the same problem that’s being discussed here?
I too can confirm that going back to 1.24.5.5173 fixed it for me too. Uninstalled 1.25, left all libraries and residual files, downloaded 1.24.blahblah, and installed. Worked instantly. Libraries were still there and everything. Now I’ve watched hours of X-Files mkvs without any problems at all.
Got the old install file from Plex Media Server Old Versions Downloads - VideoHelp.
UPDATE: Sadly the problem has returned even under 1.24.5.5173. The good news is that it’s not nearly as frequent. Now I’m getting pauses every 15-20 minutes as opposed to every 2-5. So that’s something.
UPDATE 2: Actually, the downgrade to 1.24 /did/ work! But Plex turned right around and auto-updated itself back to 1.25. That’s why the problems returned. I’ve now turned auto-update off, re-downgraded to 1.24, and that should fix everything for now. Good luck!
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I’m also seeing this issue now… very frustrating…
To anyone finding this later: This was absolutely a problem with 1.25 and downgrading to 1.24 fixed it completely. Frustrating that the team hasn’t addressed this in six months when there are so many threads about it.
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+1 Same happens to me on web browsers on different computers (Edge/Firefox/Chrome on Win11 PC and MacOS). Everything works just fine for LG WebOS TV (2019 gen).
Having same issue, and because there is no linux app, I cannot even use that. I just started paying for plex pass because I figured it was the right thing to do since I used plex on 2 servers, but since they can’t be bothered to fix anything I am just gonna cancel and look into using kodi instead.
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Have the same problem with the Plex Web Player with Chrome. Will buffer up only about 20-30 seconds then have a hard time keeping up with the video stream. Buffer runs out and video pauses indefinitely. Hitting stop then resuming the video allows it to play for another 5-10 minutes. I loaded the same video with the windows client and it instantly buffers 30minutes of the video. The problem is mainly happening with HD video 720p+. Again zero buffering problems with the windows client so I think that eliminates server resources or bandwidth being the root cause. Seems like a possible buffer size or memory limit with chrome.
