I don't know if this is a known bug but I have Silver Bolts on my secondary weapon bar and carry a staff (restoration) as my secondary weapon. Once I've used Silver Bolts and switch back to my primary weapon set (dual daggers) when I flick to my secondary weapon again (and ongoing) my staff is completely invisible (although I can see the enchantment effect flicker at the end). On occasions this has worked in reverse and my daggers become invisible.
Edited by GrimMauKin on September 13, 2014 4:05PM I am one of The Great Mediocracy, those whose role in life is to provide the baseline by which The Few deem themselves Great.