When You join a world on MCPE 1.5.3 sometimes the first item or block in the the hotbar get uncontrollably and constantly gets thrown away.
Comments 2
Cleaning up old tickets: This ticket has not been updated recently (~1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
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That happened to me for sometime but it stopped.