Do I question him?

This guy i was dating earlier this year, we took a break because he moved to Miami, but we always kept in touch ever since. Last week we talked and basically we want to try at long distance and see if it will work. Yesterday we were talking, and then he randomly stopped answering at 9:30pm. And then this morning, at 9am just goes “Morning baby”. Do I question him on why he stopped answering last night or leave it be?