The habitats dont get oxygen

I made a new little group of habitats, and some of the new habitats just don’t get any oxygen. I do not understand why, because there are oxygen processors right beside, who are full of oxygen.

Maybe districts are the problem?

Don’t think so, the oxygen processors are in the same district, and I have not set any other district to deliver oxygen to this district.

this is the same I have done with all my other habitats, don’t know what is the difference, there must be one because I have not encountered this problem before.

Have you created an export rule for oxygen in the district?