9 month old suddenly awake for two hours in night

[Lottt]

My 9 month old DD has never been a great sleeper but things had improved massively. She goes to bed fairly easily around 7.30 and she had been briefly waking once or twice and getting up about 8.
Now she has decided that she wants to be awake for approx two hours around 4am. She'll then go back to sleep until 9.30am ish!

Her daytime naps often aren't great but she doesn't seem overtired as when she is she wakes a lot earlier on in the night.

Please tell me it's just a phase?

No advice OP, just replying as I'm in that boat with DS who is 8 months. Been up since 4.30. He's on playmat and I assume will go back down in the next 30 mins. So annoying, he was a good sleeper before 😩 Can only assume teething?!

Both mine did this weird phase of being awake in the night for hours. I think they were slightly older than 9 months though but can't remember exactly. It did pass eventually. I just used to lie on their bedroom floor with them. I knew their room was safe so I could dose while they mooched about. Eventually they'd fall asleep on me and (once I woke up and realised I was on the floor still!) I'd pick them up and put them back in their cot. I always put it down to some development stage or another.

She is teething at the moment but seems happy when awake so I'm not sure if it's that or not. She actually went back to sleep after about 40 minutes which is huge progress so suppose that's something.