Upgrading old worlds causes vines to have the wrong block state

The Bug

When upgrading an old world to the latest version it causes vines to end up with the wrong block state

Reproduce

• Create a world in 1.11.2 with the seed: 7344104151492854341

• Fly towards 104 ~ -123 (You should see a swamp biome)

• Leave an upgrade your world to 21w43a

• Fly towards the swamp

World Download

Here is a world download from the world converted from 1.11.2 to 21w43a. Go to this location to see the vines: /execute in minecraft:overworld run tp @s 224.61 77.23 -4.67 85.50 30.45

Observed Result

The block state of the vines were messed up

Expected Result

The block state of vines wouldn't change