Lost Buds FE

Good evening,

​I am writing to get some information.

​About an hour and a half ago, I realized that the buds were not inside the case (I keep them hanging on my backpack using a cover with a carabiner). I had been keeping them hanging there for a couple of days, and everything was fine; I used them this morning and they were still there. Unfortunately, however, I realized that they are gone. On the Wearable app, it tells me that they are in a location nearby, but when I run the "search nearby" function, they don't show up. After a while, however, it showed that the data had been updated 7 minutes ago and they were still there, close to where I was, with the message "located by a nearby device", even though the dot is black (which I assume means offline). What does this mean?? ​How reliable is the GPS on the earbuds?? Does the locations refers to the last use from that devide?