Plex on ipadOS 15 won't play a number of videos, some others play with no sound, some play just fine

Plex Players Mobile Devices
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1

Server Version#: 1.23.3.4707 (docker image)
Player Version#: 7.19.1
ipad Pro (9.7 inch)

Problem only happens on ipadOS 15 beta. Once reverted to ipadOS 14.6 all the files play just fine. Happy to do some troubleshooting or provide logs if someone is interested

2

Known issue.