Hanging signs from the side / with a horizontal bar stay floating after destroying supporting block

Works as intended. The changelog says:
> Hanging Signs that have a horizontal bar will not pop when the supporting block is removed

Thank you for your report!
However, this issue is Working as Intended.

The report you have submitted is working as intended: as per the 22w42a changelogs.

Please note, that mechanics of the game may change between updates.
Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.

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Link to the snapshot article for future reference: https://www.minecraft.net/en-us/article/minecraft-snapshot-22w42a