Late congrats!
I had bad experience with that. Same thing and then one night yippee she went in on her own.
Next morning found her at bottom of ramp, stiff and cold. Did not investigate, too upset, but suspect others had bullied her so badly she panicked and in trying to get out managed to break her neck. I felt so guilty as I had been putting her in and letting her get on with it without realising what was probably going on.