AI transcribes lessons are lagging

I am having problems with the AI transcribed lessons. When importing an audio file there is an extreme lag. Every click, be it clicking on a word or pausing and starting the audio, marking a word as known etc. takes 5-10 seconds to be processed. This makes working with these lessons rather difficult since I can neither keep up with the audio and clicking the words nor can I stop and restart the audio on time.

There is no such problem with normal imported text files, where everything works smoothly.

Could this be investigated? The AI transcriptions are the most fantastic feature, and I am very grateful to have them, but as off now and don’t see myself being able to work with the generated lessons.

Many thanks.

Additional information: This seems to only affect lessons, where an MP3 has been imported. Imported an AI transcribed YouTube videos are fine.