Airtag not working on lost ite
I have an apple airtag on my keys. I lost my keys and signed into "find my" to locate my keys. I could see my keys/airtag on the "find my" map and it showed that they were at a restaurant that I was at yesterday. I walked to the restaurant and long story short, they were not there. While I was in the restaurant tho it continued to show me that the airtag/keys were at the same place as me and allowed me to play the sound and everything (though it was too loud for me to hear it). I left the restaurant and walked down the block and weirdly it showed the keys/airtag moving with me. I checked my bag/pockets everything again but of course the keys were not with me. I then realized I should turn on lost mode so I did that. Then I kept walking and "find my" showed the keys were no longer continuing to walk with me. Now it is showing the keys/airtag as on the corner, a block from the restaurant, where I had walked. I assumed this was a weird glitch so I went back home and tried again and now it still shows them as on that corner but it won't let me play the sound and says "airtag not reachable" when I try to play the sound but the location continus to update and show that same corner location.
What is the point of an airtag if it doesn't even work when my item is lost!!! Is there anything I can do to make the sound/location work again?
AirTag