I recently moved my base just slightly to the right of where I'm currently positioned and re-docked one of my ships fitted with a sensor on it. I noticed that it was picking up on something when there shouldn't be anything it reacts to.
When playing around with the sensors it turns out it's picking up an enemy when there is no enemy in sight.
To the left of my position there are some remnant blocks from my old base position that is covering a hole and a sphere build for the purpose of a projection. Now I build those previously so I can't understand why it's identifying them as enemy.
Instructions: Access the "Sensor" in front of you and turn "Detect Enemy" on. Wile "Enemy detection" is on, slide the Right extension out to detect those blocks. Now remove does blocks and check the sensor again.