I recently seem to have been given Penalty Clash Winner as part of my final Special Sponsor tasks. You have to "Win 2 duels in the Penalty Clash Event" which finished ages ago.

Out of 30 tasks, I only have 5 left not completed - no way I missed Penalty Clash Winner for all of this time. I'm at 1595 total points and would've been given the 19th rewards (regular and premium) if I'd had that task in a timely manner.