It's likely because of Google Summer of Code. OWASP has participated as an org several times and it's highly likely that they'll participate this time too.
Students often start making PRs around this time to get more familiar with projects before they can put in a proposal when the time comes.
As someone who's been a programmer for a while now, I feel it's pretty easy to identify slop code and when someone is using an LLM to communicate on issues. I'm not against using LLMs for writing code or even for using it to improve your communication, but it cannot be a substitute for critical thinking.
If I was a maintainer of an OSS project, I'd be more likely to _not_ select students who put out slop PRs, proposals, or messages without thought. And also make this clear in the contributing guidelines so contributors know what they're getting into.