If it is, it's cloaked... and it's HUGE. Dwarfing entire star systems...
https://i.imgur.com/8AaMqW7.png
View from Pleione
https://i.imgur.com/URuuzqf.png
View from Pleiades Sector IH-V c2-16
Only that first photo looks mysterious, the curves are too artificial-looking to be part of the nebula, unless .......... it's a bug ...... ie like the black squares that occur on planets sometimes because of graphical glitches. But then that makes it a glitch .....