Had this happen to me twice already, where Caitlyn seems to suddenly stop being able to attack enemies at 1300 range after they've been trapped or netted. One of these times was in a 1v1 to test. Breaking either passive seems to break both passives. It might be relevant, but there was also a Riven in both of those games.
I'm not entirely sure what else caused it, but it functioned normally for at least one auto the second time.