I noticed that the event might not calculate your match completions and wins correctly.
During the event, we’ve only played grouped up with my sibling (this is 100% certain) and despite that, we had a different amount of points.
I was a whole 3 points behind.
It isn’t the end of the world, but if you have only limited time to play for tickets during this christmas period it is very annoying that one ends up playing upto half an hour extra for no reason other than a bug.