Time Dilation

The real problem was the lack of advancement in distress beacons.

I mean, look, losing a spaceship to a stable micro black hole, something that we didn't know existed until we stopped the problem here, that could happen to anyone.

And losing several more ships heading to the location of the distress beacon which was just past a point beyond the death zone line, that's distressing, no pun intended.

But it all worked out once the last ship broke down before the beacon and ran scans, but if beacon technology had improved over these decades, they'd have noticed the discrepancy!