items can only be moved as groups

This is less of a bug and more of a massive issue with the UI in MCBE. It’s something I also do greatly wish changed. MCBE has some of the worst UI of any game ive ever played. (Also it dose seem like a mod responded to the bug you linked. Not sure if thats relevant or if you knew.)

Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-32352.

As mentioned earlier, the UI is different, but this is working as designed. If you have a suggestion or feedback, please follow a link below.

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