Preventing Treasure Goblin escape (portal)

[Masterkiller]

After a period of time, the Treasure Goblin will create a portal and escape. I'm sure plenty of people have tried to kill him, only to see him jump into the portal.

I have been able to successfully reset him after he has created the portal by rooting him. The Monk can use Dashing Strike, which roots the Treasure Goblin. After the root, he runs away from the portal and resets his portal timer.

I'll continue to test this, but I have had success using Dashing Strike.

[Masterkiller]

Definitely confirmed again. Portal opened, I used Dashing Strike, it knocked him down, portal disappeared. Let him open it again, Dashing Strike, once again rooted/knocked down and portal closed.

[GWARRR]

Any skill that interrupts a current action will work. Pulls, knockbacks, etc. will all stop him from opening the portal and reset the timer.