Exterior light sounds probable.. On ours there is also a small switch on the exterior light itself that has to be in the on position for the inside switch to control the light. Could be what’s causing some mystery if urs is similar.
Sure enough, The switch on the light was off. I looked at it before, but missed seeing the switch. We have been RV owners for 50 plus years and are pretty seasoned, but the Escape is unique and new to us. We'll have more questions for sure, so don't be surprised when we post again soon.
Tom & Joan