Plex Forum is the official discussion space for Plex, the media server and player platform. This page is a specific thread in the Player Betas section where users report playback problems after updating to the 2026.20.0 beta on iOS and tvOS.
The thread focuses on a reproducible issue: 4K Dolby Vision and HDR10 content will not start and instead shows an endless spinning circle, while 4K HDR and 1080p content reportedly play normally. Replies are short confirmations from other users, which helps establish how widespread the problem is.
It is most relevant to Plex Pass members running beta builds on Apple devices, as well as home theater users who want to know whether an update is safe to install. General Plex users looking for setup guides will find little here.
Read the latest pages first to see if a fix or workaround has been posted, and check the server and player version numbers before adding a report. Keep in mind that beta threads move quickly and may not reflect the stable release.
Overall, it is a practical reference for tracking a known beta playback regression rather than a standalone guide.
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