Sorry, I'm not connecting the dots. Seeing your EDIT 2, I see how Ber following crabby-rathbun would lead to Ber posting https://github.com/matplotlib/matplotlib/pull/31138 , but I don't see any evidence for it actually being Ber's bot.
Edit: Removed because I realized i WAS reddit armchair convicting someone. My bad.
Edit: Removed because I realized i WAS reddit armchair convicting someone. My bad.