Not sure if intended but pistons can now move obsidian. All my slime block doors just broke. Also because pistons nor slime blocks can push or pull pistons (that I believe was reported already).
MC-88502
Obsidian can be moved with pistons
Resolved
Duplicate
0
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-88428. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.