Let me guess your useing Alpine?
Let me guess further.. Your water dish is on top of the alpine?

Mine did this for a little bit till I stopped it and she moved back to her normal hide. Just remove the flooring so the water dish sits right on the bottom of the tank/tub.

That worked for me. they will try to get back under it but then give up and go to the normal hide(s)..

Good luck. Oh I am sure as long as the temp is good and you have good hides for them. Then all is well.