I had the same issue. I created 2 buggies & was out with 1 when it ran off & never came back. The game kept saying it was following me, so I couldn’t call it. When I went home & tried to put it in the nest, I couldn’t do it. I took the other one out & the spot was replaced by the missing one. When I tried to put the 2nd one in the nest, it didn’t register a 2nd buggy. I created a new nest to see if I could put the 2nd buggy in there & that one didn’t register the 2nd buggy either. I took the 1st one out the nest & now I had 2 buggies with me. I logged out & came back in & the 2nd one disappeared completely.