Sleep question with 8 month old

My little guy has been waking up a few times a week for the last month and a bit at 4am ready to party. He’s babbling, playing, for about an hour and then falls back asleep. We bedshare (safely) and always have but I’d like these early morning parties to stop. I kind of just ignore him until he goes back to sleep but I’m also up because he’s moving and noisy. On the days he does this there’s no change to his sleep schedule the previous day, or eating or anything different really. Plenty of outdoor time, stimulation and exercise. We follow the 2-3-4 nap rule, with his last nap ending by 3 and bedtime at 7. He doesn’t always nap well though, they tend to be short. Any ideas how to get this to stop? He’s my 3rd baby but I didn’t have this issue with the first two.