I've played 3 games in the Lantern event and won all 3 games during 90 minutes but only 2 have counted towards the task. Unfortunately I don't know which 2 it is. The 2 games against the CPU I played as the rapid match so maybe those counted but the match against a human player didn't count

Below you can see the 3 levels I've won and the task only having 2 wins.

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