I am having the same issue. I live in Ohio, USA, so it isn’t a Korea thing for me at least. I put one on each of my dogs. Today, one went missing. I have been looking for him for five hours now. I have friends and family looking too. They asked what the alert would look like if we found him, so to test it, I sent the other dog collar with my husband and a family member, both with their iPhones. They were gone 15 minutes, and I had it in lost mode with notification on, and it kept showing our home address the whole time, with the time that they left.
I am agreeing that this is not helpful. I am hoping my dog finds his way home tonight somehow, or maybe someone picked him up but didn’t call the number on his tag. If I have an AirTag on my bag, and a friend drops me at home and I forget the bag in their car, they will leave and my bag will say it is at my house with the time that they left, and I’ll never find it again, unless they find it or I remember that it was last at my house when their car was and figure it out. NOT helpful. (I was switching from Tile to AirTag, and now I am regretting that.)