I swear I've done everything right... why doesn't this work?

[Keyman]

@cool_name123

What have I done wrong?

Maybe its the “order of operations”

Inaccurate Midi Clock When Passing Through Midihub?

Once an event arrives at the MIDI IN A port, the FROM A port gets immediately processed by all FROM A ports in its entirety, including all of the virtual pipelines, until it reaches all the outputs. Then the next incoming event is processed, starting from appropriate input pipes. The order is not guaranteed and should not be depended on. You should generally assume that for each incoming event, the pipelines are processed in parallel until they reach the end(s).