Blocks that require support can generate supported by cobwebs in zombie villages

I am able to confirm this behavior in both 1.17.1 and 21w43a. Here are some extra details regarding this problem.

The Bug:

Blocks that require support can generate supported by cobwebs in zombie villages.

Steps to Reproduce:

• Generate a world with any of the following seeds and teleport to the following coordinates.

Version: 1.17.1
Seed: 5899314674982246718
Coordinates: /execute in minecraft:overworld run tp @s 128.77 65.14 -211.98 -425.65 5.52

Version: 1.17.1
Seed: 5899314674982246718
Coordinates: /execute in minecraft:overworld run tp @s 128.77 65.14 -211.98 -425.65 5.52

Version: 21w43a
Seed: -189957375475393022
Coordinates: /execute in minecraft:overworld run tp @s 2815.36 67.31 2347.36 -1043.30 9.79

Version: 21w43a
Seed: -189957375475393022
Coordinates: /execute in minecraft:overworld run tp @s 2815.36 67.31 2347.36 -1043.30 9.79

• Take note as to whether or not blocks that require support can generate supported by cobwebs in zombie villages.

Observed Behavior:

Blocks that require support can generate supported by cobwebs in zombie villages.

Expected Behavior:

Blocks that require support would not be able to generate supported by cobwebs in zombie villages.

confirmed for bells, glass panes, and corner stairs as well in 22w15a

Glass panes don't require support; bells are already tracked in MC-169827.

Or do you mean that the panes connect to the cobwebs?

I think the reports should be merged though, as the fix would be the same for both: when replacing a block in the structure, create block updates for it.