Any Mob from vanilla has no AI. Won't Move and just stands there.

Spiders... Are Ok Oddly Enough.

No AI working for villagers, Endermen, Zombies, and Creepers. Possibly more. Skeletons and Spiders work.

I also got this issue. Zombies and Creeper,s don't move at all, but skeletons do

I have been able to bandaid-rectify the AI issue by disabling the following optimizations in the config.

mixin.ai.goal=false
mixin.ai.nearby_entity_tracking=false
mixin.ai.pathing=false

These seemed the most logical related to the issue at hand, AI now appears to work.

I have been able to bandaid-rectify the AI issue by disabling the following optimizations in the config.

mixin.ai.goal=false mixin.ai.nearby_entity_tracking=false mixin.ai.pathing=false

These seemed the most logical related to the issue at hand, AI now appears to work.

How did you do this?

Fixed in 0.0.5 update.

I have been able to bandaid-rectify the AI issue by disabling the following optimizations in the config.
mixin.ai.goal=false mixin.ai.nearby_entity_tracking=false mixin.ai.pathing=false
These seemed the most logical related to the issue at hand, AI now appears to work.

How did you do this?

In your configs folder, you can bring up the config file for Canary. (canary.properties)

By default it is blank aside from some notes. You can add config booleans according to the guide here. I generally looked at what each setting related to and disabled those three accordingly. Simply add each one of those changed values with their own line in the config file and save.

EDIT: You will need to restart the game after changing the config if the game was not already closed.