-30C Freehub lube?

If a person is riding their bicycle in -30C (without the windchill factored in to even lower temperature) and they have some intermittent cases where the freehub freely turns once pedaling starts again after coasting; would they be advised t o remove the grease or oil inside the freehub body entirely so that that lubrication does not freeze and cause the unwanted freewheeling?

Cheers