UPDATED
There are specifically two problems that occur in 1.11.2 creative/survival singleplayer and on realms as well:

1. Tame ocelots will stalk towards the player when the player is holding fish.

• When feeding them the fish they will have the same reaction as a wild ocelot but will enter breeding mode.

2. Wild ocelots that are not stalking the player will emit hearts when fed fish.

• Does occur in all gamemodes but is only an issue for creative mode since ocelots that are not stalking the player will not sprint away.
• Despite the hearts, they do not breed or tame

A quick video of it here:
https://youtu.be/FZEPwr5C6Lo