What just happened? All of a sudden I got a billion diamonds?

This game is a grind anyway and since it's a WP game it's kinda glitchy too.
It's OK, I kinda like it anyway.
So sometimes when attempting to invade another persons game it won't work unless I restart the game.
So I restart.
When the game starts I noticed where it shows your diamonds, the numbers start going up very fast. This is right after the game loads but before it asks which save to load. I told it to load after it got over a billion ( I wasn't sure exactly what was going on really )
Now I have about 1,090,000,000 diamonds. I had 7 before that.

Any idea what happened or how?
I googled around and found out there is a cheat for this on PC, but couldn't find anything about WP.

I wish this would have happened at the beginning of the game instead of the end.
Made the final boss a cakewalk.

Has this happened to anyone else? Can you recreate it to help others?

I've read about it happening before. It's a glitch, heavily in your favor. Don't think it can be purposely recreated, so be happy it happened to you!