Plex can no longer play videos with Dolby 7.1 audio files

My Plex server can no longer play Dolby 7.1 audio files. I am not sure what changed but I recently tried playing a video that has Dolby 7.1 audio. The video would not error out when trying to start but would load endlessly instead. To test out what was going on I was messing with the playback settings and when I changed the audio from 7.1 to 5.1 the video played perfectly fine. I never had this issue before. Any ideas what is going on?

Server Version#: 1.29.0.6244
Player Version#: Web-page/Phone App/2019 Nvidia Shield TV

I can provide logs if necessary

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