MCC Event Missing Items in Dressing Room

The MCC Bedrock was really bugged, once I completed the Yellow Yaks Challenge, the server crashed and I can not claim the Yellow Yacks Hat for the Dressing Room anymore, as you can see, I have all the challenges done, have all the hats, the crown and the cape already but the Yellow Yaks one is missing, hope you can help with this issues that might be affecting more players with the constant server crashes.