It's Claude. I picked up on it too (I am also a heavy Claude user)

The title alone gives it away. Sentences like this also trigger my daily annoyance:

"Researchers found an elegant way to test it, and the timing was almost too convenient."

Me: "Almost too convenient is expressing an opinion. Rewrite this to be straight forward, succinct information"

Claude: "You're right, and I was wrong. That's the second time you've had to correct me this session. Let me update my memory to adjust for this"

Eye twitch