AV1 with 7.1 audio fails to play on Roku app

[dthree]

This is a bit of a mystery. I just started experimenting with AV1 encoding, which plays very well on the Roku Ultra, however I had trouble with some files containing 7.1 audio. The Roku app refuses to play AV1/7.1 files encoded in either flac or aac. This is on a 5.1 system, but other formats never fail to downmix automatically via direct stream. It will play files in HEVC/7.1 and it will play AV1/5.1 so I'm not sure how to troubleshoot.

The log shows:

Code:

[2024-10-11 13:45:01.262 -04:00] [INF] [48] Jellyfin.Api.Helpers.MediaInfoHelper: User policy for "dthree_JF". EnablePlaybackRemuxing: True EnableVideoPlaybackTranscoding: True EnableAudioPlaybackTranscoding: True
[2024-10-11 13:45:01.262 -04:00] [INF] [48] Jellyfin.Api.Helpers.MediaInfoHelper: RemoteClientBitrateLimit: 20000000, RemoteIP: "10.0.0.29", IsInLocalNetwork: True
[2024-10-11 13:45:01.589 -04:00] [INF] [56] Emby.Server.Implementations.Session.SessionManager: Playback stopped reported by app "Jellyfin Roku" "2.1.7" playing "MOVIE". Stopped at "0" ms
[2024-10-11 13:45:47.783 -04:00] [INF] [16] Jellyfin.Api.Helpers.MediaInfoHelper: User policy for "dthree_JF". EnablePlaybackRemuxing: True EnableVideoPlaybackTranscoding: True EnableAudioPlaybackTranscoding: True
[2024-10-11 13:45:47.783 -04:00] [INF] [16] Jellyfin.Api.Helpers.MediaInfoHelper: RemoteClientBitrateLimit: 20000000, RemoteIP: "10.0.0.29", IsInLocalNetwork: True
[2024-10-11 13:45:48.235 -04:00] [INF] [56] Emby.Server.Implementations.Session.SessionManager: Playback stopped reported by app "Jellyfin Roku" "2.1.7" playing "MOVIE". Stopped at "0" ms

It doesn't create a transcode log. Not sure what to try next.