Ahoy, Archer, Sniper Duel and Treasure Hunter don't work when you try to complete them. I did this several times in a world that isn't in Creative mode or having any cheats enabled.
MCPE-166155
Certain achievements don't work
Resolved
Invalid
0
Thank you for your report!
However, this issue is Invalid.
Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets. Each Achievement has different requirements, so if you are able to earn some other achievements but not certain ones, each must be reported separately
However, please review the Bug Tracker Guidelines before creating new reports. Be sure to search for an existing issue as some of these at least have already been reported.
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