location sharing

One of the people in my network has share my location turned off for their iPhone and Apple Watch but I can still see their location in the Find My app periodically. Sometimes it says “no location found” and then after a period it will locate them and it can go back and fourth like this. Sometimes it even shows a live location and the last time it did this it was stationary for 5-10 minutes when I know that they were moving around a lot. When I look at their individual devices both the phone and watch say “not sharing location”. I would think that having the share my location option turned off that I would not be able to see this person. Any insight will be appreciated