Element missing in perform mode render

Hi there,
I have this custom application that I’m building for some LED sticks. I use an ‘OP Viewer’ that takes a camera OP as the source. This is a part of a parent OP that is called UI that is displayed in perform mode.

Screenshot 2022-01-05 at 14.44.05

The problem is that what I see in the perform OP is different in my editor than in perform mode. This is what it looks like when I press View in the editor

And this is perform mode

As you see the red sticks are missing in perform mode (and some gradient sticks are not obscured by another element as they should be)
I’m guessing there is some culling issue or such between the editor and perform mode. But where?