Our 19.5 month old does this and has done this for nearly 4 months.

The only way she gets back to sleep is if DH (not mum) picks her up and comforts her then lays with her on his chest. Once she is asleep he can move her back into her cot but its getting trickier the older she gets.

I have wondered if its her starting to transition to no day sleeps but she is SO tired around 12 she'd crash regardless. Its the night waking and not being able to get back to sleep that bothers me.

I have no answers for you but wanted you to know you're not alone x x x x

Nae x