Prevent MIDI Master Controller from being used on all instruments

I have a Beatstep Pro controller/sequencer running as my MIDI Master and I can’t quite figure out how to prevent the midi from being played on all my instruments.

I’ve attempted to go into my instrument and setting the Input Device to my Arturia Keystep and setting the channel to 15 under the MIDI tab. However, my MIDI Master continues to play on that instrument regardless.

I have tried to turn off all the checkboxes on Record & Play filter but no effect.

What am I missing here?