Devil's Hand turning yellow

Hi everone! I recently aquire two large devils hand leathers, they were both lightpink/tan one had some extended polyps when I got them. Since (about 3weeks) the polyps are not extending and it is turning a yellow/green (same color as my very happy toadstool). My water parameters are good and I have 2x40w t5 as well as a strip led fixture. It is the only coral in my tank doing odd things. Everyone else is very happy and open...any thoughts? Thanks in advance