Toadstool Leather closing in blue light

[ARiSiNG]

Got a Toadstool Leather a few days ago and not sure what is wrong with it.
It seems to be fine opening up in white light but when the lights start to turn to blue for night viewing, the polyps retract.

 

[andrewey]

Some of my regular toadstools do this. As long as it looks healthy under normal lights, I wouldn't worry about it. It might come out more during actinics after a few days/weeks or it might always have this habbit. Coral are fascinating!

 

[New&no clue]

I have three different toadstools, all three retract their polyps when the daylights dim.