Pac man frog not Borrowing?

Hi, I am petty concerned about my pac man frogs healthy, he hasn’t been moving much or borrowing. I recently added a CHE to keep the temp up, during the day temps are 78 to 82F and room temp at night, humidity is always above 80. He eats every couple days. But he is just not been active. What is wrong?

I'm not an expert on frogs by any means, but is this new behavior for him? Have you changed anything in his tank lately? Some frogs feel safe without burrowing if they have enough clutter.

When I didn’t add the CHE, he borrowed and is quite active. That is the only change I made