If she's trying to escape and roaming during the daytime hours I would be concerned that something about the husbandry is off, but your description of temps/humidity is spot on. If she's roaming and trying to escape at night its not as irregular a behavior as it would be during the day.

I keep my snakes in tubs but I've had success in getting a stubborn snake to eat by moving him from a 32qt tub to a 15qt tub temporarily. Its a lot easier for me to switch to a smaller tub than it would be for you to switch to a smaller glass viv but have you considered trying a tub until you can get him feeding? Its just an idea...

If not you could monitor his weight with the current set up and just go with the flow, making sure he's not losing a lot body mass, and offering a meal once a week.