Yeah, same here. Not on all videos, though. It appears the creators can activate the translation 'services' for their videos. On some channels I get the AI-translated audio consistently, on others the original track as usual. On the YouTube-website, the affected videos also have translated video titles, but not in OnlineVideos. The unaffected ones don't even show the option to choose an audio-track on the website, so either the creators have deactivated it or YouTube just hasn't gotten around yet to process them.
One beacon of light is, that on the YouTube-website the original audio track is marked as such, so hopefully the original track can be requested specifically by the plugin somehow.
The fix simply adds all possible audiotracks to the quality option list. To select different audio track, manual quality selection must be used. It can lead to large quality list but for now at least there is some option. I'll try to implement different approach (standart MP audio track selection during the playback) but it will take some time to rework the OV player to support multiple audio stream sources in the graph.