To add, my mod uses one effect played on characters that uses 'Bip Head' (or similar) as the effect bone, I don't know if playing an effect at this bone can lift up a helmet forever, it should not at least.
(It should not lift up a helmet at all actually even for the time of the effect.)
If it does, I'd consider it as a game bug.
A mod that modifies effects could interfere though, but I don't know anything about all the graphics stuff, so I can't say.
