Why is it only happening in some chapters?
There's no good way to know. Troubleshooting is borderline magic in good times, and you apparently don't have good times.
Because there are so many Blue Yetis around, we pretty quickly discovered how the curse worked and how to prevent it. We even have a "Frying Mosquitoes" filter to get rid of most of the Yeti distortion in post production.
You are a one-off with a no-label, affordable microphone that nobody else has, and your sound damage isn't common.
I have a rule of thumb if you spend more than two weeks struggling with a bad computer microphone, stop using the computer.
I submitted a technically correct audiobook audition with that.
That's a Zoom H1n sound recorder. My to-do list has me figuring out to shoot an audiobook on my phone.
Koz