They just group at the bottom of the map and chill, wont send any fighter to help frontier ships even in their battle range.
I tried to order them to go closer front line but didn't work, and "Fighter Strike" command sometimes have no effect either.
I have 4 Herons with 1*trident, 1*dagger and 1*broadsword, and an Astral doubles the fighter.
Is the problem caught by my fighter build?
IMO, carriers should be able to "suppress" a ship two tires lower, and won't be killed quickly against a ship one tire lower, in a solo close-range battle, AND AI SHOULD KNOW IT.
For example, a CVL tire carrier like Heron should run over a frigate easily(except Hyperion), and can fight with destroyers.