#1 - Feb. 18, 2020, 5:21 p.m.
Blizzard Post

With realm restarts in each region (just completed this morning for Americas realms), we’ve made a change for addons that query unit health.

Now, the UI API functions UnitHealth and UnitHealthMax return health values for NPCs (rather than percentages), information that a very large number of players have been generating with the Real Mob Health addon.

This hotfix has no impact on PVP, as these functions will continue to provide health percentages for enemy players or the units they summon, as before.