Being under stress and being ill at the same time can change your modus operandi. I know, because that happens to me, too.

When I'm too tired, too stupid, and too stressed, I stop after a point. Otherwise things go bad. Being sick adds extra mental fog, so I try to stop sooner.

Being aware of it needs some effort, though.

Read the article. The use of AI was not accidental, but how the output was used was.

Paste the original blog post into ChatGPT asking it to summarize or provide suggestions. Unintentionally copy and paste quotes from the ChatGPT output rather than the original blog post.

A fever can cause altered mental states, confusion, etc. It's not surprising that someone suffering from one would act out of character.