When exploring, I sometimes come across other packs where there's the option to "chase" them and most of the time it works as intended, but when encoutering a specific pack, the place where it usually shows the other pack's wolves stays blank and the chase button does not work at all. I checked their den and apparently they have no wolves yet are able to explore? How is this possible?

This is probably more of a bug, but it happens to me a lot. I don't think it's my wifi because the rest of explore goes quickly, even when I hit an arrow to move off of it.