The history of the 'Firechasers' had come to an end, but the history of the 'Lightchasers' had just begun.
As the 'end' of that cosmic battle royale, the death of the 'Firechasers' completely stopped the 'Cradle' galaxy from shrinking.
When the Homeship, 'Dawn Star,' turned into a dazzling light, the darkness threatening the entire 'Cradle' stopped shrinking.
Perhaps because the contraction was mainly aimed at the 'Firechasers,' even after the last batch of 'Lightchasers' completed their 'cocooning,' the 'Shrinking Universe Observation Ships' at the border did not detect any signs of darkness approaching.
They didn't know if it was because their equipment wasn't sensitive enough to detect the tiny traces of 'shrinking.'
In short, even after everyone was reborn, the 'Shrinking Universe Observation Ships' at the border were not recalled.