Transformer MIDI insert instance causes long wait on MacOS?

Hello folks -

2013MP, Mojave 10.14.6, Cubase 11.0.0.

I’ve made two transformer presets - one that moves mod wheel to CC21, and another that moves breath controller to modwheel - to control Spitfire Libraries with breath without changing the libraries.

I instantiate the first one, and I get a spinning wheel that lasts around thirty seconds. Same when I do the second one. After that it works fine. Any ideas as to why it takes that long? Only one instrument track in the whole sequence.