I edited a Halion Sonic 3 organ preset (Blues Split 2) and saved it as a VST3 file. If I then open MediaBay and double click the new preset it loads fine, and I can play the sound. However, as soon as I click E in the VST panel to open the Halion Sonic editor, Cubase crashes. I’ve tried it multiple times, and even rebooted my PC. It happens every time.
If I create a new instrument track with an instance of Halion Sonic 3, then load my new VST3 patch, everything works fine. I can open the editor without issue. The crash ONLY occurs when I load the sound by double clicking from within MediaBay.