Toes curled under in jumperoo/bouncer

Hey all! A question for those who have a jumperoo/bouncer… my parents have the Fisher Price Rainforest bouncer (which seems like quite a popular as have seen a lot of people with it). We don’t have anything like this at home so he’s only used it a few times for short periods while at my parents. When he was in it today I noticed that his toes are curled under his feet… as opposed to feet flat on the floor. His legs were bent and he was happily bouncing away (he loves it!), but it’s just worried me a bit that his feet didn’t seems to like being flat on the floor even when I tried to adjust them, they’d go back to being curved under… what are your babies feet like when they’re in the jumperoo? Is this normal, especially maybe for the first few times as not used to standing or anything just yet..? Or did your babies feet just naturally always sit flat on the floor…? 😓 (baby is 7 months)