PMS using 100% of processing power, unable to play anything

Plex Media Server NAS & Devices
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Host OS version: Raspbian GNU/Linux 10 (buster)
Hardware: Raspberry Pi 4, 4Gb RAM
Plex Media Server version: 1.27.1.1571-2fface66
Docker tag for the image: version-1.21.2.3943-a91458577
Brief description of the issue or bug: Whenever the server is running, the CPU is always loaded at 100% capacity, and whenever I try to play any media, I recieve the following error: An unknown error occurred (4294967283)
Steps to reproduce: Start docker container, then play any video

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The last version that worked fine is PMS version 1.27.1.1571-2fface66 which corresponds to Docker image tag version-1.20.5.3600-47c0d9038, this particular image only loads the CPU to 30% when idle, and a maximum of 60% when playing something.

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The same :
[After update 300% CPU is loaded - RP4 - docker]

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Finally found the solution of this issue after literal weeks of searching:

https://docs.linuxserver.io/faq#my-host-is-incompatible-with-images-based-on-ubuntu-focal

In my case, I had to switch from “latest” to “bionic” image tags from dockerhub

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