AU plugins not offering outputs in FL Studio

Hey people,

So I've been fighting against this for a couple of hours now. Read the doc thoroughly, watched videos, lurked the forums, and I can't crack this.

I want to route the instruments in my Kontakt rack out to mixer channels in FL Studio, but I can't, for the life of me. After looking into it, I noticed that 1) this is also the case in other NI plugins (Battery 4), 2) this happens in Kontakt 6 and Kontakt 7 Player (haven't tried Kontakt 7 proper, but will tomorrow), 3) this is exclusively a problem with the AU versions of the plugins (works as expected in VST versions).

Here are some comparisons:

(left is VST, right is AU for Kontakt 6)

(VST)

(AU)

(VST)

(AU)

(VST)

(AU)

As you can see, AU does not seem to resolve the outputs correctly, regardless of what I do. I found mentions to this:

1) Regarding Battery 4: https://www.native-instruments.com/forum/threads/battery-4-not-showing-connections-in-fl-studio.459223/

2) And regarding Kontakt: https://forum.image-line.com/viewtopic.php?t=212142

Regarding the latter, OP seems to have solved it via reinstalling, but that was not the case for me.

I tried:

• Reloading the plugins
• Reinstalling Kontakt
• Reinstalling FL Studio
• Updating FL Studio
• Updating MacOS (to Ventura)
• Of course restarting Mac (restarted during Ventura update)

Nothing worked.

Any leads here? Is this expected behavior? Am I doing something wrong? Anyone else experiencing this?

Thanks in advance!