CEH Rune inconsistency

CEH: summon a spirit wolf companion to attack enemies for 8 seconds.

Bug: Wolves vanish when they are not supposed to. I have o keep reactivating them by re-slotting the rune or mount and then dismount. I use The Nagu Rune with CEH while I have active familiars so the wolves will remain on the field. But they disappear either right after they are summoned or just randomly in mid battle. The wolves will randomly return eventually due to them being reactivated by just about any change I would make or due to relocation. I’m 100% sure it is a bug as I have been using the wolves since last season and I’m constantly testing different ways to keep them in the field.