Wayfarer Poland Reward - Upgrade issue

After the Poland event I was awarded an upgrade on my WF account. The problem is that this upgrade has never shown up on any of my nominations. I have the total count of 27 upgrades in the profile, but only 26 nominations listing out as upgraded.

I have a strong feeling that one of my very old nominations instead of getting an upgrade was just "wiped out" from my WF. Due to it being quite old I am not fully sure which one. Has any fellow Polish player experienced a similar issue?

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