Toddler demanding we fix the blanket over and over.

My daughter is almost 3. She has typically been a good sleeper. We do our evening bedtime routine, put her in the crib and walk out and she's good.

Now the new issue is she moves around and the blanket rolls off of her. So then she calls out wanting it fixed. She doesn't demand anything else when we go in. She just curls up in a ball like "okay cover me" and then we leave again. But 15 minutes later she's done it again.

In the past, this would happen like once or twice, but now it seems unending. She has been in bed since 7:30 and it's now pushing 9:30.

Anyone else have this issue? I seriously don't know how to get her to stay under the blanket and she just doesn't get how to pull it over herself on her own in the dark.