Hedgehog falling over while eating

My little guy is about 4-5 years old now and sometimes when he’s eating he’ll fall over and just keep chewing his food on his side. Is this normal? He’s running around his cage making hides everywhere all night but he doesn’t use his wheel as much as he used to when he was younger.

Also does he look a good weight when I first got him he was obese according to the vet so I cut back on his food little by little.