How I Found The Bug: While I was trying to get an axolotl into a boat I decided to use a lead and it got in then the lead popped off of the axolotl then I then decided to break the boat and then the axolotl was sometimes trying to follow me when in its sight range.

How to reproduce:

1.  Find or spawn in an axolotl
2. Use the lead on the axolotl and then remove the lead from the axolotl
3. Try to get it to see you and it may follow (It is kind of easier to reproduce when there are no other distractions) and may also follow you out of water and then realises that it is out of water and try to go back in

It can be hard to reproduce but I have managed to get it to follow me a few times.

This bug may relate to MC-208626

Note: I had no tropical fish in my inventory or hotbar