I’ve been having similiar experiences. But I just ignore them. I’ve been taking the if you want a ghost to go away just ignore it approach to this stuff (I’ve not seen ghosts by the way). I used to watch ghost hunters and have friends who do that kind of thing but it’s always where they look for the negative. I did that for a bit and it can get carried away looking for things and trying to get evidence… So I don’t even entertain that sort of thing anymore.
One thing I did learn though is if you see something out of the corner of your eye go back to thinking and doing as you were right before you noticed it. I found that for whatever reason if you’re aware of the peripheral stuff there’s always just a basic explanation for it. Like it’s just how your eye perceives it based on anatomy and whatever else goes into that. I found that I can recreate the phenomena. So now I just ignore it really. I think it’s just perception opening up and shifting really.