Missing Health when moving map location

Not sure if this is a bug or actual game play.

But, whenever I mouse click on the map or scroll across regular map to a minion, NPC, tower... anything with a health bar:

Players health goes from full to their actual health. Would be nice to have it show their actual health always, no delay. This will help players not think that an enemy is near (when in fact they are all at their base).

Anyone else notice this?