[Script] Problems with the battle A.I.

[Turn20Negate]

Hello there everyone,
While editing a Pokémon game I ran into a problem with the A.I..Multiple Poison type Pokemon don't attack at all (skip their turn) when fighting against a Steel type. For example this Crobat: "CROBAT,75,LEFTOVERS,BRAVEBIRD,ROOST,TOXICSPIKES,POISONFANG,0,,,,IMPISH,31" doesn't attack at all when sent out against Steel types, but when I change one of its moves it attacks. F. ex. :("CROBAT,75,LEFTOVERS,BRAVEBIRD,ROOST,TOXICSPIKES,HEATWAVE,0,,,,IMPISH,31").
If anybody knows why this would be the case I would be grateful.

Here is the battlelog I recorded:
|
***Round 1***
Initial switchscore building: Statuses (0)
Initial switchscore building: Stat Stages (0)
Initial switchscore building: Healing
Initial switchscore building: fsteak (0)
Initial switchscore building: Typing (0)
Initial switchscore building: Specific Switches (-20)
Crobat: initial switchscore: -20

Initial noswitchscore building: Stat Stages (0)
Initial noswitchscore building: Entry Hazards (0)
Initial noswitchscore building: Better Switching Options (0)
Initial noswitchscore building: Second Wind Situations (0)
Crobat: initial noswitchscore: 66

{

Brave Bird: initial score: 49
Brave Bird: final score: 44

Roost: initial score: 25
Roost: final score: 0

Toxic Spikes: initial score: 30
Toxic Spikes: final score: 39

Poison Fang: initial score: 1
[The foe Crobat lost 14 HP, now has 237 HP]
[The foe Crobat gained 14 HP, now has 251 HP]
|
If any of you need further data to know what's going on just tell me.
Thx in advance :)