Sometimes they'll wedge themselves between the hide and side of the cage assuming a few things:
1. It feels more secure that way.
2. More heat exposure.
3. Hide is too small.
4. They don't like the hide anymore.
5. The snake felt like a change.
I'd say leave it in there for 2-4 more weeks and if he doesn't use it and/or stops eating, it's probably time to make a change of hide box.