I discovered a very strange bug in the Transformer of Cubase 15.
Please take a look at the following Transformer setup I made for “snare roll” programming.
Anyone who has programmed drums before probably knows what this is meant to do. In short, this Transformer lets me trigger the snare drum (normally assigned to D1 in a standard GM layout) also from E1, making fast snare rolls easier to play.
At first, when I create this setup, it works exactly as intended. However, once I save the transformer preset or duplicate the MIDI track, the Event Target Filters settings no longer stay correct!
In this corrupted state, instead of triggering D1 from E1, it somehow tries to trigger D1 from G8 — which obviously makes no sense.
It’s as if some little ghost went in and secretly changed my Transformer settings! 
I hope this issue can be addressed in a future update.
