Matrix #451 won't turn neutral

[Player9738]

Hey folks,
I'm on my first play-through (but late game) and I came across a peculiarity: Although no Xenon has been seen there in a long time, Matrix #451 is still owned by them.
All Xenon stations have been destroyed and no Xenon ship in hours, not even an S.
The Khaak installation is of course there and makes a happy training ground for new pilots, but the sector is shown as belonging to the Xenon,not the Khaak.
Could it be because it is their very last sector? All other Xenon sectors are in either my ownership or in the hands of other factions. An I believe I killed every station in Matrix #451 before progressing to Matrix #9...
It is possible that the Teladi and I both had an administration center there when the last Xenon station fell, but the sector didn't turn grey (instead of green) either. It is still red and belongs to the Xenon.
I even checked in Plot View: There is no red plot except the Khaak one.
Any idea what I can do to purge that red color off the map?
(game is 3.30 on linux, vanilla, without split)

[EGO_Aut]

There are more than 2x factions with defence stations in the sector, ergo it will not change until there is only one.

[Player9738]

I absolutely expect it not to turn green as long as there are defense stations in there. But should it not turn grey instead?

[EGO_Aut]

Atm not

[chew-ie]

My guess is that even in your combination (no enemy, only you & your ally own a defense station) the very "simple" mechanic does not trigger - which it should do if there is a distinct result. So if you or the Teladi loose a defense station it should change.

But I've to say - I agree. As no one owns the sector, it should become neutral territory. (it clearly isn't owned by the Xenon anymore, so coloring it red as in "enemy territory" isn't valid anymore)

[Player9738]

Oh well, I just de-assembled my administrative module and by that gave the sector to the Teladi. I still have 50 defense modules in the sector, but player defense does not seem to count the same as npc defense modules...
At least the sector is not "owned" by the Xenon any more.