It seems to be related to this bug: When i destroy a piece of redstone, a piston or a lever attached to a piston directly, or further down the line (while the device is not operational) it also causes the crash.
Phrook
It seems to be related to this bug:
When i destroy a piece of redstone, a piston or a lever attached to a piston directly, or further down the line (while the device is not operational) it also causes the crash.