Hanging signs are all destroyed at the same time upon losing support

The Bug:

Hanging signs are all destroyed at the same time upon losing support.

This behavior is inconsistent with similar blocks that require support such as caves vines and weeping vines.

Steps to Reproduce:

• Summon a large tower of hanging signs all of which are supported by a singular block.

• /setblock ~2 ~20 ~2 minecraft:diamond_block

• /fill ~2 ~19 ~2 ~2 ~1 ~2 minecraft:bamboo_hanging_sign

• Break the diamond block that's supporting the hanging signs.
• Watch closely as the hanging signs are destroyed due to them losing support.
• Take note as to whether or not hanging signs are all destroyed at the same time upon losing support.

Observed Behavior:

Hanging signs are all destroyed at the same time upon losing support.

Expected Behavior:

Hanging signs would all be destroyed gradually starting from top to bottom upon losing support, following the behavior of similar blocks that require support such as cave vines and weeping vines.