Anvil in y=0 turns to item when falling

[cgw2023]

Expected behavior

In vanilla Minecraft, a placed anvil block will fall down if there is no blocks below itself, it will then stopped on a solid block, or it will turn into an item if the block below is not a solid block such as slabs.

Observed/Actual behavior

In folia, when anvil is placed at Y=0 and it fall down, the anvil will turn into item.

Steps/models to reproduce

Place anvil like this, left side works normal, right side have problem.

Video recorded in production server by player. Same problem have been confirmed in a newly created folia test server with no plugins and default config files
https://github.com/PaperMC/Folia/assets/136877036/793a63f1-125c-4fbe-9ea0-6858f0ea7888

Plugin and Datapack List

Server Plugins (0):

Folia version

This server is running Folia version git-Folia-"25ee657" (MC: 1.20.4) (Implementing API version 1.20.4-R0.1-SNAPSHOT) (Git: 25ee657)
You are running the latest version

Other

Default spigot.yml paper-global.yml paper-world-defaults.yml bukkit.yml is used.