YGOPRO Forum

Unorthodox, and largely not game breaking, but upon player usage of "Darkness Approaches" (which, by discarding 2 cards as cost flips a monster face down, but does not change it's battle position) and flipping a monster into Face-down Attack Position, the AI proceeds to not attack with any of it's pre-existing monsters, even if it has a direct hit. Monsters summoned after the use of "Darkness Approaches" are unaffected, but any monsters on the field at the time of its resolution will not attack, even if the AI puts it into ATK position. Additionally, the AI will not flip summon the Face-down ATK position monster (but will use it as tributes for a tribute summon).

This includes monsters not affected by "Darkness Approaches" (i.e. AI has a Blue-Eyes White Dragon and an X-Head Cannon, and the Blue-Eyes is flipped into Face-Down Attack Position, the X-Head Cannon will also not be used to attack.)

Not a dire issue, but a bug nonetheless with the AI script.