Focus Punch not working correctly

[HumongousNoodle]

If a Pokémon becomes locked into Focus Punch by Encore but selected a different move that turn and hasn't already moved, it will use Focus Punch at the priority of the move it selected regardless of whether it took damage that turn, and the charging message will not appear.

At least, this is what the core games go by. Yet when (for example) breloom gets encored and tries to use mach punch punch on that same turn, it just gets the normal focus punch effect.