Yes, it’s the last major issue with Dolby Vision on CoreELEC.
Also, this is a workaround for an issue that does not seem to exist on CoreELEC. So this workaround breaks Dolby Vision playback, causes videos to be played at double refresh rate, and fixes nothing.
As @chuckster tested, 25fps content with 48khz audio does output audio. However, a double refresh rate does occur. So reverting this PR will uncover another issue.