Cubase 12+ Input Transformer "Project" not working

I’ve been using the Transformer MIDI Insert effect to increase the volume of incoming midi keyboard.

Somehow I can’t figure out how I can use the input transformer for the project.
I choose ‘Project’ from the dropdown in the Inspector of the VST Instrument and set up the transformer in the same way I would do with the MIDI Insert Effect. But it doesn’t do anything.

Any ideas highly appreciated!

Playing around with it for an hour now and suddenly its working with the exact same settings.