Split nights again!?

If i let my little girl have a long day sleep (more than 1.5h) she'll 100% have a split night, so I just wake her up if she doesn't wake up on her own. But sometimes they're just developmental and there isn't much to be done unfortunately 😩

Pretty sure we had some developmental ones a couple of weeks ago as there was literally no reason (that we could tell) for them, as day sleep hadn’t changed. Lasted about a week and then without us making any changes, his sleep went back to his normal (still not a sleeper through!)

I'm sure leap 9 is happening about now