Yeah, I can't really see being so grateful to a creature that I normally brutally and sadistically kill, as to give him my spaceship.
Maybe the classic hacked the BSP's ship as an escape plan, but got caught in the act, and the BSP's had not realized classic had gain some control of the ship. Much later, the BSP has to then activated self destruct on the ship once he saw it was rogue, and he could not control it.
Maybe access to the self-destruct is hard-linked only to the owner's gauntlet, as a last resort measure in case a ship is taken.