The Verle Task Force transitioned back into FTL immediately after the space burial. They needed to leave the vicinity of the Detemen System as soon as possible in order to throw off pursuit.
In truth, the caskets thrown out into space for the space burial might easily be detected by any scouts that entered this system. Ves guessed that Major Verle wasn't stupid enough to leave behind some breadcrumbs without a good reason. Perhaps there was a deliberate element of strategy here.
"I don't think anyone in the Kingdom expected your Vandal fleet to split up." Iris explained when she saw his puzzlement. "It's even more perplexing that this task force is heading in the opposite direction."
At the very least, it would scramble the defense forces of the Kingdom and force them to split their focus, but only up to a certain extent.