wow ive never seen enemy escorts attack each other. They are pretty elite when hunting together. Ive noticed one is just sitting there pinging while he other hits my position and then the other stops pinging and hits a guessed position next. Pretty awesome escorts sometimes. But sometimes they are also plain dumb, i sank 4 ships in a convoy without them even reacting and actively chasing me. I stuck on that convoy well but torp failures and misses only allowed 4 sinking