Exploding Gems since last update

Since the last update I encountered several times exploding Gems whilst playing. :open_mouth:
Can someone try to explain to me the how what why? :thinking:
I tried to find out what I want to know via the official pages but either the devs forgot to put it in there or I missed it. :grimacing:

What was your team when you noticed the exploding? What was the opponent’s team?

Sorry folks, I found out where it came from. Was a new trait on one of my troops I missed :woozy_face:
So regards this topic as closed :vulcan_salute: