I would have been freaking out and here you are drinking coffee and walking around looking for it lol.
I have had a similar experience though.
When my husband and I moved into this house it was a small a-frame. After being given the opportunity to buy, we decided to add on to it. The walls downstairs were tore out and straightened to add extra bedrooms, kitchen and living room.
I guess this upset our unseen roommate because for months, every once in awhile, after my husband would leave in the wee hours of morning for work, I would wake up to the sound of someone yelling “goddammit”. Sounded like from the area where the kitchen and living room used to be. Maybe he was mad because the coffee pot wasn’t where he left it. It stopped after those few months though, so maybe he got used to it.
Just a random thought, I do notice that when something happens and our phones and wifi aren’t working strange things happen. I wonder if technology interferes with their ability to interact or if my mind is usually occupied with other things and the silence allows me to focus more.