Hmmm not sure about staying in the room. I put each of the children in their own separate room and it is always the same room, same bedding, same location so that they get used to it pretty quickly and know which is 'their' spot to sleep.
I am surprised because she goes down quite happy, waves bye to me and then when I start heading towards the door will stand up and cry.
If I go back in to put her down again (i have tried that) it gets worse (louder) and more intense so I have given up putting her down and retucking her.

I am not sure if she sees me that she would sleep. It is something to think about