We'll need more specific information on the setup you have, pics would be best.
Specific questions:
- How are you heating? UTH? CHE? RHP?
- What's the temp on the cold side and the hot side?
- What's the size of the tub?
- What's the animal given for security options? (Hides? How many? Plant cover? Which substrate? Tub sides blacked out?)
So pics of the animal and also the setup will help us possibly root out issues on your end, which is all we can really do. Seems to be some issues on breeder side as well, based on the information you've given, but nothing to be done about that. All we can focus on right now is trying to rectify what might be causing the animal to have these reactions.
Going into the vet and getting a checkup and fecal screen no matter what is also advisable.