Crate nap question – waking up barking

I think I know the right answer here but looking for reassurance.

13 week old puppy has started really losing it – howling, barking etc after just an hour of sleep in the crate. She can definitely hold it, doesn’t need to eat – I think she just wants out. I should just ignore this right and let her work it out and calm herself down? She goes in fine and falls asleep ok, this is just waking up barking well short of the 2 hour nap goal.