yes, its the module bug.
everytime i find a lodium class cruiser in the battle. its pretty much a guarenteed module bug. only fought against a minster once and got the bug, but everytime there's a lodium, guarenteed bug.
it could be that either when the lodium cruiser gets destroyed, the core in the back doesn't register as destroyed aswell? or when the lodium cruiser retreats, it counts as the cruiser retreat and not the core?
By the way, completely unrelated with the above: can i buy a minster class ship? does it spawn on tri-tachyon military shops? i've been going arround and arround those tri-tachyon military shops and so far, nothing.
edit: spelling error and:
if the bug affected ships with modules. wouldn't the cathedral ship from SWP be affected too? i've fought against it in combat and never got the bug, only with lodiums