Quote Originally Posted by AvatarVecna View Post
Q355

Cast "time stop" while already in a time stop. What happens?
A355: RAW is fuzzy, but probably the same thing that happens when you cast any other spell on yourself twice. Current iteration of the spell ends, and the "refreshed" spell takes precedence. Any effects "queued" in Time Stop go off and then the new Time Stop begins, rolling 1d4+1 rounds to determine duration.