[MCPE-184435] The challenge progress in the MCC server activity was cleared

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I took a long time to complete the challenge list in the MCC campaign, but all my completed challenges and my coins are gone, I don't want to spend a lot of time to complete these challenges again, I want my progress to be restored.

This happened after I quit during the Melt Down game, but I'm not sure it wasn't the cause because my progress wasn't cleared when I tried to reproduce the Bug again.