I was using Fable to review my codebase and came back from the gym an hour later to find that I had suddenly used up my entire Max plan quota for the next 5 hours

(I have never had an agent do enough to burn up the 5 hour quota on Max)

(edit: just switched my CC model to 4.8 and my 5-hr cycle reset back to 0%, even though it previously had 2 more hours to go)