From my experience as a mother of 3 I think you can be consistent to let her stay in the bed until you're ready for her to get up. It may be a phase because of teething or just new growth spurts.
My 6 month old has been doing the same thing, waking herself up lately because she's rolling around in the middle of the night, when she used to only laying on her stomach to sleep. Last night I found her fussing and lying on her back, turned her back over and she was just fine.
It could also be that you could keep her up a little later, maybe to 7:30 or 8 and see if that would keep her asleep longer.
I hate to say that it's kind of an experiment to see what works, but it is! :) Hope you're able to get it worked out smoothly and quickly!