Once you hop on a boat, something seems to go wrong with Abigail's following behavior. She moves only in little twitches and spurts, and she falls behind. She also doesn't teleport off-screen like she normally does. Getting back off the boat doesn't fix it -- she behaves the same way on land after that. Relogging while on land seems to be the only thing that corrects her. So far it happens with both the raft and the armored boat, guessing it occurs with all boats. Possibly a side-effect of the latest update's changes to Packim's follow behavior?