Hi all,
unfortunately there is an unexpected behaviour in HALion 6.3 / HALion Sonic 3.3 with using and assigning quick controls.
We are already investigating this. It will be fixed with the next version.
If you need quick control assignment for your work, you can rollback to Version 6.2.20/3.2.20.
Please download from here:
https://download.steinberg.net/downloads_software/VSTi_HALion_6/6.2.20/Halion_Application_6.2.20_Installer_mac.dmg
https://download.steinberg.net/downloads_software/VSTi_HALion_6/6.2.20/Halion_Application_6.2.20_Installer_win.exe
Sorry again for the inconvenience.
Best regards
Frank