Can't find version 1.2.8 any more.
When setting up multiple sticky pistons vertically specifically triple piston extensions up and down will change a sticky pistons, normally the last one moved into another block. I've gotten andesite and stone. Normally will happen at the final retraction especially when there is no normal block being pulled down.
Linked issues
duplicates 1
Comments 2
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-28260.
This issue is covered in MCPE-28260.
Your additional information and observations are very useful, so if you can add them to the comments section of the parent issue it would be appreciated.
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Moved to the correct section.
For further bug reports about Minecraft (bedrock codebase) for Xbox One, please post them here.