I have seen this same thing frequently and for years over my neighborhood. We call them the sky guys. There is a military facility not far from us, and we just assume they are drones of some kind.
I do not live near a military facility, but I have frequently seen drones flying overhead as I'm sitting on the deck enjoying a cigar. They usually have red lights on them.
“we just assume they are drones of some kind.”
Most likely.