1.Rebind the "pick block" key (mine is my 4th (extra) mouse button).
2.hold down ctrl and press the "pick block" key.
3.Nothing will happen.
(if you didn't rebind it, it'll work)
(4.if you mach mid mouse button + new pickblock button + ctrl you sometimes get a block whit nbt data)

solution: Change code to Not default to the mid mouse button but to the configuration of the "pick block" button.

(p.s. i did search and didn't find this yet but it's a buggfrom day one of the pickblock nbt change)