Hi Florian,
Seems to be a serious bug with the quick controls assigned to the filter (cutoff, etc…) with the latest update. It might not happen on older instruments, but I was making new instruments in Halion 6 with the latest update and any quick control assigned to the filter cutoff, resonance or distortion works fine in Halion 6, but when you export that preset as a Halion Sonic SE layer preset and then open it in Halion Sonic SE the quick control for the filter, etc…does not function. Going back to the previous version fixes the problem only if the preset is exported in the previous version of Halion 6.