Wow indeed
Yea its amazing how when a DD runs over the sub the DD generaly loses

Not exactly realistic but... it is what it is.
By the way the reason you lost track of the other escort is probably doing the old "One destroyer sits and listens while the other thrashes about"
A quick scan with the scope before surfacing is in order. Often your alerted to a nearby DD when the tracers come raining down on your scope