Hi There,

Version: 1.1.4 (Retail)

"health bar's" for all mobs in range disappear on selecting a single target.
Seems to come back when you move the camera to not have the mob in view and then move camera back to view mob

This for a default installation, no adjustments, no profiles loaded and only running this kiwiplates. (all other addons turned off)

Before

After

I have resolved this by performing a full nuke on my cvars.

Turns out that bouncing between Plater / ThreatPlates / ElvUI, did a real number on my cvars

The fix is nuclear
(it's a full default reset, including a few in game options)
(keybindings / Click Bindings and Macros are not affected by this as they are stored separately)
/console cvar_default