Prior to MC 1.13 one could not move Note blocks with pistons nor with slime blocks.
In MC 1.13 it is possible to move Note blocks with Pistons and slime blocks.
In the update log for 1.13 there is not staded that this function have been added (nor in the snapshots).
I don't know what other info I can give, I can record a small vid for a more visual comparison.
With kind regards
BjornK24
Environment
OS: Windows 10 (amd64) version 10.0
Java: 1.8.0_51, Oracle Corporation
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
LWJGL Version: 3.1.6 build 14
OpenGL: GeForce GTX 1080/PCIe/SSE2, version 4.6.0 NVIDIA 397.93, NVIDIA Corporation
Question: If it's suppose to be a function, how come It dose not work in 1.12.2?