I originally read this as "It might be an issue of time travel," which would be another very fun possibility to consider. ;)

Probably not. Oumuamua, the first extrasolar object we've tracked through the solar system, has a hyperbolic excess velocity of ~30km/s, or 1/10,000 of light speed.

So in a billion years, such an object could travel 100k light years, or the diameter of the entire galaxy.

Sub-relativistic interstellar travel is very slow on human timescales, but fast on geologic ones.

I went to read the paper and I am wrong, they looked at the minerals and the physical conditions to form them, and they are consistent with a place and a phase of the creation of the solar system.