Group Warding reaching 90+%

[KGB]

It's at turn 60 in a very long game (Sloppy Swish 35597).

I noticed an enemy stack with dual Rangers and some items has reached 90% Group Warding (from combat with it last turn). I thought Group Warding was supposed to be capped at 70%?

It's incredibly dangerous to allow Group Warding to rise to 90%+ (or worse, 100%). This would make a high level Barbarian virtually invincible as there would be no way to kill him (especially one that gets Gabriels Heart). Even a strong hero stack (which my opponent has) is almost unstoppable.

KGB