You should have round hides.That being said I have a pastel male that will not stay out of his water bowel. I started fearing scale rot and took his water bowl from him yesterday.I will give it back today.If your BP has been doing this for awhile I would look for mites very carefully .Use white paper towels for substrate and look in his water for dead mites.Also you may want to treat him for mites just in case.
Good Luck! Mike.