The Bug:
Double and Triple Piston Extenders (Both vertical and horizontal) cause the player to clip into the block being pushed by the extender when the whole sequence extends. Extended delay does not fix the problem. This does not apply to single piston extensions.

Steps to Reproduce:

• Build the setup shown in the attachment below:
  
• Stand on the stone block pictured in the setup image and flick the lever.

Observed Behavior:
The player phases into iron block upon the extension of the second and final piston.

Expected Behavior:
The player should be pushed along by the iron block by 2 blocks instead of phasing through.