Audio sync broken on Xiaomi TV Box S 3rd Gen (Google TV)

Plex Players
1

Server Version#:1.43.0.10467
Player Version#:10.30.8.4222 (58d01a81)

Android TV OS build:
UKG3.250826.001. V816.0.7.0.UZFAABX

I have an LG OLED tv and there’s a notable audio sync issue on the Xiaomi TV box (Google TV based). This is noticeable over both my ARC soundbar and Bluetooth headphones. Using Plex both on the TV and the Xiaomi on the same file confirmed I wasn’t imagining the sync issue. Other video apps seem to not suffer from the same sync issues.

I’ve noticed there’s a lot of talk about bugs in the recent firmware update to this device but as I’ve only bought the device today I have no frame of reference for this and if it pre-dates it.

I can’t find any way to manually set a sync correction in Plex unless I’m missing something obvious - is this a known issue and is there anything I can do to fix it?

As an aside have any other Google TV users noticed this as well, or is it isolated to the Xiaomi?

2

A follow-up with an interim fix - setting the Xiaomi TV Box’s sound output format to PCM fixes the audio sync issue (the default as on most devices is Automatic).

But again, other video apps with the same video file did not suffer from this audio desyncing even before the change, and nor did the LG’s own Plex app so I do feel there is an app specific issue here that should be addressed by the developers.