Samsung Galaxy S4 Android 5.0.1 MCPE 0.12.3

This affects tamed ocelots (cats) too. Below I talk about wolves/dogs because over generalizing is confusing.

What happened: I focused on a tamed wolf when I was holding a fishing rod that had been cast and the action button that appeared said "Fish". Clicking it retrieved by bobber (as expected) but it also changed my tamed wolf from sitting/standing (not expected, and a bug).

What I expect to happen: I expected to retrieve my bobber. To change my tamed wolf's sit/stand position, I expected to have to change my current item away from the fishing rod to something that does not have an associated action button. This would work the same as when I have food in hand and the action item displays "Feed" which overrides the action sit/stand when I am focused on my tamed wolf.

Confirmed in creative & survival modes with spilt controls on or off.