My White's Tree Frog that I've had for about about 8 months started burrowing in the back corner a few days ago and has remained there. It has not even exited at night which is quite unusual as it will normally sit and look expectantly for food after waking from its usual resting spot on the back wall.

The humidity (between 50 - 60%) and temperature (between 70 - 80F) have not changed nor has the diet or any other environmental factors as far as I'm aware. It did exit the burrow briefly after I misted the tank but returned the following day after defecating (usual appearance) though it was not interested in eating.

Is this normal behaviour and if so, should I continue the usual regimen of misting and water changes? I wasn't sure if they undergo a "hibernation" of sorts and do not want to unnecessarily disturb it.

Thanks in advance for your advice to this neophyte.