SEGA other companies would have patched the exploits already why haven't you? Blight round is suppose to move to the next target and not linger on the last target. If you can't figure out a way to deal with this problem at least patch it where you can't blight round non-enemy targets such as minerals and boxes.
I already see people saying "why remove a helpful bug?" to answer it is a bug and it must be fixed and there are already several guides showing you where minerals spawn. On a personal note it clutters the screen and makes the game look ugly.