[AI] Most player as the AI stop at tier 3 problem

[Ironside]

Hello, so after a long time I decided to continue one of my maps, I soon noticed that the AI, for most players who used it stops doing what it should right before it should upgrade to Tier 3. It looks as if they're unable to upgrade, as they still still try to fight with the units they made until then, ...
About 1-2 maximum 3 AI players do it perfectly fine but the rest just don't do it and therefore always become food for the other players.

I'll attach the AI script (in rar file because it doesn't alow to upload .wai files) and the map.