1.21.1 Neoforge 21.1.209 ``Crash while using tag tool on stairs after right clicking air``

Is there an existing issue for this?

• I have searched the existing issues.

Are you using the latest Structurize Version?

• I am running the latest beta/release version of Structurize for my Minecraft version.
  I am also running the latest versions of other mods that are part of my problem.

Did you check on the Wiki? or ask on Discord?

• I checked the MineColonies/Structurize Wiki or I asked on discord.

Minecraft Version

1.21

Structurize Version

1.0.790-1.21.1

MineColonies Version (if related bug)

No response

Related Mods and their Versions

No response

Current Behavior

I was trying to tag a sit location location in my restaurant made entirely of vanilla blocks.

Expected Behavior

No crash.

Reproduction Steps

Use tag tool and use it on stairs.

Logs

Minecraft crashed. The logs have been uploaded to gnomebot.dev: ### latest.log | debug.log head / tail (~68k lines) | crash-2025-10-08_06.08.11-client.txt | crash_assistant_app.log | modlist.txt ### Mod list changes beyond the latest successful launch: ansi Mod list wasn't modified.

Anything else?

No response

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Start by reproducing the crash in Structurize 1.0.790-1.21.1 on Minecraft 1.21: use the tag tool on stairs after right-clicking air. Then inspect the linked crash report and latest.log from the provided gnomebot.dev links; done means tagging a sit location on vanilla stairs no longer crashes the game.