X-B125 starfield had recently been designated as a no-fly zone by the Joint Pursuers Alliance. All spaceships were prohibited from entering this starfield. Only researchers approved by the Alliance could go there to investigate. The reason was that there was a serious unknown cosmic anomaly here that might cause danger to those who entered by mistake.
The Alliance formed in the upper three spiral arms was very stable overall, and the member civilizations were very positive, but there would always be conspiracy theorists who were used to spreading rumors and causing trouble.
Some people thought that the Alliance was trying to cover it up. They must have discovered a huge benefit in this starfield and were unwilling to share it with everyone. That was why they announced that there was a serious abnormality here.