I found that telling Claude I was going to bed meant it continued on making assumptions for longer rather than asking lots of questions or stopping part way.
I've seen that sort of thing before - I told it I was going to go take lunch or dinner, and it told itself this would be a great opportunity to try to keep plugging along while I was AFK.
Same - at the end of the day I'd leave my last turn running with something like "I am going to bed so keep going until you are done" and be surprised that in the morning it'd kept going.