The Dawnguard Rune Shield loses it's aura benefit if instantly equipped from the favorites menu or from a bow to another one-handed weapon with the shield. That however, is manageable, what's not is that when the shield is equipped all NPCs comment on the fact that the player is wielding a dangerous spell. It's a clear nod to the shield. I speculate that the aura shares the same script as a cloaking spell since it's technically not an enchantment. I feel those too bugs are easily overlooked but just as easily becoming of a problem. Having NPCs yell "That spell looks dangerous!" And to "Keep your distance!" Is tediously redundant and a major inconvenience.