When running the Berserker Elite Specialization, sometimes it will trigger a Sigil of Geomancy effect on weapon swap (It triggers the earth animation and applies Bleed).. even if no such Sigil is equipped.
I notice it quite frequently, doesn’t seem to be 100%, haven’t really paid much attention to it since it doesn’t really affect my overall gameplay.. I think it only happens when weapon swapping in Berserk mode.