Yep, it's just with our most recent move, since May. Coincidentally, her setup at the previous two houses were very similar - she was blocked off in the kitchen with a big sliding door wall to look out of during the day and her bed was on top of, or next to a heating vent. Never had any issues with her peeing inappropriately - she always went in her litter box, even though there were two different carpets in the living/dining room area that she had access to. When we would come home, she wouldn't even get up out of her bed cause she was so comfy.
The setup of our new house is a bit different, namely in that she can either be confined to the living room where there is a big set of french doors to look out, or she can be confined in the kitchen/dining room, which has a heating vent, but no window to look out.
I wonder if it is something as ridiculous as that. She's just not as comfortable while we're gone and that makes her mad? lol.