Does this track the depletion of the shielding?
As a Paladin with GBoK on I let a mob hit me to 70% health and the tracker still said 81k with a full bar.
EDIT: Weird it seems to track the depletion 'sometimes'. Like in old-Karazhan (after pulling pretty much the entire instance as I one-shot the bosses), the amount recorded did deplete. But in Broken Isles the mobs would whack me I'd take a small amount of damage the first hit (thanks to the absorb). However, the tracker would still say I had 100% of the amount GBoK grants. -- I'm guessing a timing issue? Where the addon only scans the API every so often?