Just wondering.
I don't think I missed this information--- But, what size enclosure is this?
What is the ambient temp of the room the enclosure is in?

" I think the problem might have been that she went to the cool side, directly under her log, and it was too cold so she tried to get warmer "
I think I would have to agree with this.

It is a painstaking task to try to figure these things out !