I found a ghost block glitch using pistons, it's quite weird. You can have floating sand using it but it will disappear when you exit the world.and btw you can't abuse it to duplicate blocks.
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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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Could not reproduce in Windows 10. I tried about 25 times and the sand always fell.
Someone else should try this on another Android device.