The Bug:

Tripwires occasionally have incorrect block states after upgrading old worlds.

Steps to Reproduce:

• Launch an instance of 1.11.2.
• Build the setup as shown in the attachment below. setup.png
• Exit the world and upgrade it into the latest snapshot.
• Look at the block states of the tripwires closely.
• Take note as to whether or not tripwires occasionally have incorrect block states after upgrading old worlds.

Observed Behavior:

Tripwires occasionally have incorrect block states after upgrading old worlds.

Expected Behavior:

Tripwires would retain their block states after upgrading old worlds.