Korg MS20 legacy controller Patch not working

I have a Korg MS20 Legacy controller that controls my MS20 VST instrument. I never had any issues but I recently noticed that the patch cables don’t work: I can use all the knobs on the controller and play notes, but when I use the patch cables, nothing happens. (the plugin doesn’t apply the patch cables). When I run the MS20 plugin as a standalone instance on my Mac (Ventura), everything works fine. Does anybody know why the patch cables don’t work when I use the plugin in Nuendo? (N13.0.30, MacBook Air OS Ventura 13.3)