Saying 'hey' cost me 22% of my usage limits

Ok, something really weird is going on. Revisiting opened Claude Code sessions that haven't been used for a few hours skyrockets usage. I literally just wrote a "hey" message to a terminal session I was working on last night and my usage increased by 22%. That's crazy. I'm sure this was not happening before. Is this a known thing? Does it have to do with Claude Code system caching? The 46% usage in my current session (img) literally comes from 4-5 messages across 3 sessions I had left open overnight. https://preview.redd.it/iz4owc5c98rg1.png?width=2064&format=png&auto=webp&s=a32207f305ea677033e9d4a45317c57b16b38b76