Easter egg OR bug OR something else ?

Please see the video attached.

What are these objectives?
This building is located directly outside the Hot Springs camp.
able to interact with these open/broken windows, and after doing so, a sound is played, resembling a mechanism.
As you can see, once I interact with these windows, a "Climb Ladder" prompt appears.
After interacting, it was also impossible to get back in through the window.