I've looked at quite some separation anxiety questions and none seems to tackle the problem we're facing. I do not think that this is a duplicate.
Dog: soon to be 8yo female Lab-x (probably)
We moved into a new apartment recently. We've filmed our dog when she was home alone (anything between 2 minutes and 3 hours) to see how she's behaving in the new environment when we are not around. The footage shows her walking through the apartment, whining every now and then for a bit, getting onto the sofa (which she shouldn't do) to look out the balcony door, laying/sitting behind the apartment door for more than an hour and even standing up against the wall to look out the window. Even when she lays down she has her head and ears up and is actively searching for us. She has never shown this behaviour in the two places we've lived before. She's usually not left alone for more than two hours, she's with family when I expect to leave for a longer period.
When we're at home she is perfectly fine and relaxed in the new apartment and she got used to the new sounds quickly (we haven't lived in an apartment building before). She sleeps in the living room by herself (health reasons) and mastered that from day one (I can hear her snore and dream bark).
In both places we've lived before she was fine alone and dozed until we came back. Even now she's perfectly relaxed at my parent's place where she spends her day a few days a week and is left alone with my parent's dog during the mornings.
The only thing different now is that she cannot observe the door from her bed which she could do in the other settings. We can not put the bed anywhere else as a regular spot and we don't want to move it when we leave cause we feel it will encourage the "active waiting" mentality.
She's not necessarily walked before we leave but it's happened. The video shows no signs of a difference in her behaviour regarding this. We have a routine with her where we tell her to lay down in her bed (if she's not), pet her a bit, say our goodbye phrase and leave. She knows exactly that we're gonna leave and seems fine with it in all settings. But as soon as I close the door she's running into the hallway. She does not do this in other settings than our apartment.
She has a Kong that she has access to 24/7 (we use it as a chew toy without treats) but she has in no setting ever engaged with it when she was alone.
Core of it all:
She has never before shown this behaviour and is still fine alone when it's not in the new apartment. We hope this is gonna wear off sooner or later but I'd like to know if there's anything we can do to help her with the situation until that happens.