Why does Coop Mode not work for my Assembly?

I have three assemblers currently on my station. Two are marked for Coop Mode and named Slave I and Slave II. I only issue build orders to the Master Assembler. But the other 2 assemblers do not get any build orders. I can issue direct orders to the slave assemblers though.
It starts working when I set my entire base to be owned by nobody though. It won't work when everything is owned by me.
Is there a way to get my assemblers working while the base is owned by me without tearing down/rebuilding the whole base? All Items in the base are currently owned by me and shared with the faction (Screenshot says differently, but I changed it), I double checked that.
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COD CO-OP Install Suspended - The CO-OP mode still not working FIX
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