The "Inception" Xbox achievement requires to "Push a piston with a piston, then pull the original piston with that piston."
I've done this multiple times on my iPhone 6 and on my PC. Neither version seems to be unlocking. I had friends with this very same version. Been reading on different places and other people seem to have this same issue with this achievement.
UPDATE by @unknown
This bug has been reported to our internal bug tracker for further testing and a fix. It is scheduled to be fixed in one of the future updates (no specific date can be provided).
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This bug has been reported to our internal bug tracker for further testing and a fix. It is scheduled to be fixed in one of the future updates (no specific date can be provided).

Thank you very much, Aleksandra.
@bouteille stephan: Hopefully we get our achievement soon 🙂

Glad I'm not the only one having problems with this. I was watching a bunch of videos trying to piece together what I was doing wrong. Hopefully it will be an easy fix for the next update! (Playing Win 10 version 0.15.4)

Also experiencing this problem on Windows 10 v0.15.4. Thanks the response though! I thought it was just me at first, same as above looking around everywhere trying to figure it out.
Thank you again.

The problem still persists on it didnt work on Windows 10 beta v15.6 and now on v15.7 still broken hopefully fixed before v16.0 drops.

Just tried it on the new v15.8 on Windows 10 and it's still broken.

This achievements is now working on Android, as long as you are using the 15.90 beta. It is still not working on Windows 10 however.

This achievements still does not work on Windows 10, so I don't believe this ticket should be closed. It only works on Android.

Has this been tested on IOS to see if it is fixed? That was the original platform with the issue.

Still not working on Windows 10, confirmed today. Version 15.9

That is correct @unknown because the fix is in a beta testing version only out on Android. When 0.16.0 is released, the fix will be included for Win10 and other platforms.

Achievement does not unlock on Windows 10 Edition, version 1.1.2.

The achievement still does not still unlock on Windows 10 Edition, version 1.2.11
Same issue for me on android version.
I try to unlock this achievement since 0.15.3 version with no succes.
I unlocked it on my win10 edition in a previous version but i don't remeber witch one.