As the title states, sometimes Temerity’s barrier does not work correctly. I have a 100% pair, and 95% of the time I get a barrier for the correct amount as I have life (no bonuses to barrier) of around 15k. Sometimes, however, I get a barrier that will not exceed around 50-80. No matter how many potions, shouts (Barbarian healing passive) or life steal (Doombringer), the barrier will not correct itself until I un-equip the pants and put them back on again.
Playing Hardcore, this bug would have resulted in a few deaths if I had not been checking the barrier amount regularly.
Typically, after a loading screen of some sort, I double check the barrier amount by drinking a potion. At least a few times each night I have seen the bug and have to “reset” the pants.