It seems like the graphics are missing for the frames where it doesn’t show the hat. (Each frame basically has to get the hat added)
The baldness happens (I assume) because admins set the area manually where the hair might clip through the hat. I assume in the laying frame the whole head has been set as no hair area.
anyhow it might take a few until the hat gets updated as it requires someone to add the hat graphic for the frame and then upload it.