Waxy Monkey Tree Frog Behavior Question

[Murray of the Deep]

I'm a fairly experience reptile keeper, but I just got a waxy yesterday. Did plenty of research as to the heat gradient, the structure of the terrarium, etc. I feel pretty comfortable with all of that. I have a question about his behavior thus far: When I brought him home it was during the day. He was active for a few minutes before settling into a spot on the lower level of the terrarium. My concern is that he has yet to be active at night. I stayed up for quite a while last night, and he didn't move from his spot, which he continued to sleep at all day today. As of tonight no change.
This morning I did observe him waxing for a little bit, and repeatedly opening and closing his mouth for a few.
For those of you who've kept waxies, does this sound like behavior typical for a frog acclimating to a new enclsorue due to stress?

Here's some technical info on the setup:
enclosure is 12" x 12" x 18" tall
The gradient of temperature during the day ranges from 95 at the basking spots near the top, created by a rock ledge, grape wood, and artificial vining plants. Midway down the enclosure I have manzanita and grapewood and the temperature is about 85 degrees. At the floor of the terrarium teh temperature was about 80 degrees. Humidity is very low, raninging from about 20% to 30%. The lighting is a 40 watt blue "day" bulb and then a red 60 watt night bulb.

The guys at the exotic reptile place in town (which is very reputable) said that it sounded like the most likely cause of his behavior was stress from being moved. Just wanted to see what others though since I know how delicate amphibians are. Thanks!

it's normal and trying to adapt to its terrarium my greenbacks also do the same thing opening its mouth from time to time and now it stopped it's ok it wont do that if it already adapted

[Helios]

Thanks! That's what I was wondering. It's reassuring to hear that's what others think as well!