I fought a battle where my fighters had the setting to engage fighters at 100% and cruiser and frigate set to 0%. The enemy had some fighters that came towards my cap ships to engage while others were set to escort. At the beginning of the battle our fighters would meet in the middle and mine would fire at the incoming fighters as they passed but then continue on to engage the fighters set to escort. Shouldn’t they actively engage the first fighters they encounter? Also, since it might matter, what is the difference between setting an engagement priority to 0% and deleting it?
I think I could make a deployment that would demonstrate this fairly reliably if that will help.