Audio Waveforms bugging out/disappearing

This has happened on multiple projects and usually only affects one imported audio file per project. I work primarily with .wav file types.

Upon importing, the audio files show the correct waveform and play back perfectly fine. I can also edit the file for about an hour without issue (usually splicing with the razor tool, A.I. remixing, or modifying decible levels). After an hour, the waveform bugs out - often turning to a solid block or disappearing completely. I assume this has something to do with the edits I'm making to the file in the programme. If I try to zoom in on the waveform after it initially disappears, it may flicker briefly back into view before vanishing completely.

I've followed the advice in this old thread:

https://community.adobe.com/t5/premiere-pro-discussions/audio-waveform-not-showing-visually/m-p/10231981 

(cleared media cache, rebooted etc) but this appears to be a different issue to the ones described there.

I'm reporting this in the hopes someone from Adobe can investigate this issue and determine what actions (if any) are causing the audio waveforms to bug out.