this is caused by the metallic pigments in the foil. Some printers are not able to handle the static issue.
FYI, we have a brand new silver which will be available soon which is not causing any static even on your printer.
For now I have one alternative solition for you. But this is on your own risk!
Print your design on the B-Paper with the media setting Labels 1 in not mirrored mode.
We have made some tests without any problems. Normally it is not allowed to print on the B-Paper, but in this case it is the only way to have a good result.
After printing you have to marry it with an empty A-Foil with the settings you are always using.