Sneeze2K

so kinda weird issue ive had since my car has been tuned with AEM V2 that my tuner and I cant figure out. I'll keep it short and to the point:

-idle surges and stumbles when current is drawn from battery (radiator fan, window motors)
-idle will correct itself after voltage change but only until the accessory switches on/off again
-alternator has been checked and is good
-battery is brand new
-i also have a pretty aggressive 'ign vs idle error' table that didnt help much

after doing some research, sounds like the problem is in the primary injector battery offset table but the injectors are stock and are selected as so in the wizard.

any ideas for what could be causing this issue?