Baby keeps rolling at night and waking up

[clgdo]

DS learned to roll a while back but never did it at night. He is a tummy sleeper and has always slept very well.

Until now....

The past few days, he wakes up overnight and immediately rolls onto his back. Either that, or he's sleeping on his side and falls over onto his back.
Once there, he thinks its playtime and won't go back to sleep.

We are up several times a night now trying to get him back to sleep - which he won't do unless he's fed. I'm at my whit's end and don't know what to do. To make things worse, DH is going out of town this week and DD doesn't nap for me anymore during the day. I will be a walking zombie.

Any suggestions? BTW, he moves around too much for a sleep positioner.