Just because you watched it means nothing. You could watch it 1 million times, but you are watching only 1 random occurrence. Sure they won handily, but I am suggesting it is a statistically unfortunate event. You had the upper hand, yet they still won.
Imagine it this way: Out of 100 Games
50 Games you win by 20+
25 games you win by 10+
15 games you win by 1+
6 games they win by 1+
3 games they win by 10+
1 game they win by 20+
It is a bell curve with the advantage heavily on your side. Just because the game you watched happened to fall in the 1 possible chance out of 100, doesn't mean the new engine is rigged.
I have played 2 straight games in the new engine on TIE, both away, and won them easily.
Disclaimer: This is just an idea, I am not saying this is definitely the reason you lost.