@wou33190m About 2 months ago on Discord, Bent said changing anki_audio_format=wav from wav to mp3 in the migaku mpv config file should fix this problem. I just recently had to remake a bunch of cards because I updated to the newer version on github. I assumed the fix would have been included but I guess it hasn't.
@itsmepairoa Yeah the dictionary functionality has been moved from anki to the browser extension. It seems like the anki add-on is only there to make anki a better experience while the browser extension handles everything else. Maybe to prepare for the Migaku SRS? 
It pairs really well with Vivaldi's side panel so I'm all for the change 
