Rolling away from tummy time!

Han 💁🏼‍♀️
My baby (5.5 months) is so close to rolling from her back to front but hasn't made it all the way. She can however roll the other way! Whenever I put her on her tummy or side she immediately rolls onto her back. Even with toys, me or the TV in front of her to look at. 
Is anyone else experiencing this? Any suggestions to encourage her to stay on her tummy?