Leap 4 or no?

Da

So we’re nearing the end of leap 4 but for the past few nights my LO has been waking up at like 3 or 4 and just stays awake and babbles and screeches in his crib for like an hour and a half 😩 I’ve tried nursing him back to sleep but it hasn’t been working. He just gets restless and wiggly in bed with me so I put him back in his crib and he just continues to babble for what feels like hours haha and then once he gets tired again he whines and cries and I usually have to help him get back to sleep. Anyone else’s LO do this? He’ll eventually go back to sleep and sleep til like 7:30 but idk why he’s wide awake at 3am! He does nap quite a bit during the day (probably totaling 4-5 hrs). Not sure if that might be the problem or if it’s just a part of leap 4. Any thoughts??