When after I entered the game and then it automatically signed in onto my account, I decided to search for something on the Marketplace, then I entered it and then my game crashed. Even in multiple times attempting to enter the Marketplace it crashed all over again.
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Thank you for your report!
We're actually already tracking this issue at MCPE-68973, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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