To reproduce: 1) Get call to corpse from the "death" screen 2) Auras, defensive proficiency/2h proficiency, campfire effect is applied 3) Get a real rez while in the same zone 4) Auras, camp fire standard of power, defensive/2h proficiency is not reapplied Workarounds - all very annoying: Manually apply a bandolier to reenable defensive/2h proficiency, get out of range of the auras and back. Campfire standard of power has a really long range. Shaman pact of the wolf seems to have zonewide range, so can't get out of range of that. Alternatively relog or zone.
This sounds like the same bug that affects Wurmslayer Guard and Skull of Null, where only one of them is applied and you have to reequip the other item to gain its effect. This happens every time you zone with both items equipped.