Audio freezes at a certain point in timeline and resets

So when I play the audio, at the exact same time on a video, it will just restart and it won’t play anything passed that point. This only happens on some lessons/uploads but it’s happening at a decently high frequency. I’m noticing it also freezes when I pause to click a new word I don’t know. Then it just won’t play even if I refresh the page etc.

Next time it happens can you please provide lesson URL so that we can test on our end? Thanks!