There's a crash on stadia when changing the audio device from 5.1 to stereo.
There's also a related issue where voice chat breaks when changing from 5.1 to stereo.

The background is that CL14889950 was introduced to fix a technical requirement violation for stadia in UE4.26+ and UE5. That CL appeared to worked well but there's a report from a licensee saying it causes a crash: [Link Removed]

The licensee kindly provided a fix and says that the issue needs to be fixed at the Mixer level, not the MixerPlatform level. This seems to require audio expertise to fix correctly.

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Won't Fix
ComponentUE - Audio
Affects Versions4.275.0-early access5.0
CreatedMar 10, 2021
ResolvedJan 24, 2023
UpdatedFeb 8, 2023