Audio overview quality degradation

I was using Audio overview from NotebookLM for years to digest information on the go. It has always done a good job and would work with multiple sources.

Today I uploaded four documents on a company, it only summarized one of the sources. And I noticed this for the first time, an irritating quirk. The hosts resorted to saying mechanically or mechanics every other sentence. To the point I couldn’t listen to the podcast without laughing maniacally waiting for the next thing they would say is mechanics.

Has anyone else experienced worse audio overviews quality? I know length has been cut it seems but the quality of analysis seems so much worse.