How accurate is AirTag tracking on different devices?

I am on a trip on a motorcycle. When I pulled into my hotel after riding all day, my phone says an AirTag has been tracking me all day and shows breadcrumbs on a map to wheee I stayed the night before. I try to use my iPhone to find it but can’t find it anywhere on my bike. I change clothes and walk with my iPhone and iPad across the street for dinner. When I get back, the AirTag tracking shows it went across the street.

The Finding AirTag arrow points to my bike consistently, but the tracking shows it went across the street and my bike did not.

Is it possible for another Apple device to mistakenly show up as an AirTag? Or is there one on my bike and the tracking map just messed up because I went across the street.

[Re-Titled by Moderator]