BP not using hot hide

[trailblazer295]

It's been a few weeks that I've noticed everytime I check on my BP he isn't in the hot hide. Hot side temp is 91f inside the the hide and 78-80f on the cold side. Hot side has pro products RHP and UTH, independent on Ranco stats. Humidity generally 50-60% (higher now because all cocohusk was just changed) He still eats on a weekly basis, sheds fine. The last month he was at the local store being babysat. He did this the few weeks before being moved. Brought him back home Tuesday morning. The first night I saw him laying on top of his hot hide for awhile before moving back to the cold side. I first saw this when I first bought him, it seemed like he didn't know he could inside because once he first went in he stopped resting his head on the top of it. This is the same hide from when he was 260g he is now around 550g. It's a medium exoterra cave. Is it possible the hide is too small for him now? The cold side hide is larger. It's spot cleaned weekly and all substrate changed every month. The equipment setup, location and temps have been the same since I first set up the cage.

This is how I found him last night when I got home. He hung out like that for about an hour before going to the cold hide. You can see the RHP in the top left. The light is an LED strip I only use when I want to look at him. It's off the rest of the time.