dimlet, do you have a save game showing this behavior? If the infantry is dismounted, a direct fire hit on the carrier should not take out the dismounted infantry. If it was indirect/artillery fire (rockets, mortars, field guns) hitting the unit, both could be lost depending on the number of ...

I use SOP, in order for the infantry to dismount 2 hex from the spotted enemy. Despite this, when the ifv is destroyed, the infantry is destroyed automatically. Is this how it should work?