Further insight on what possibly could be THE bug in the Overheal rune

I and a handful of players have been noticing that Overheal isn't showing the total amount of damage blocked and ultimately shows a big fat 0 in the runes HUD in-game.

I theorize that the rune is only displaying the recent amount of damage it has blocked from the last time you've charge the shield.

So if you blocked damage with the Overheal rune, the stat in the runes HUD will update. Then if you charge it again the Overheal rune stats will reset to 0 in the HUD.

But if you still hover over the rune symbol on the HUD the description box will still say that the total amount of damage will still be 0.