1 grass block replaced with crimson nylium

👁‍🗨LOL

there is not enough information here for this to be a proper report.

please attach screenshots or logs, and better define the problem you are having.

until then this will probably be marked as Invalid/Awaiting response

Ps.
the comment 'lol' does not help 🙂

Thank you for your report!
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Here is how i found this bug: when i was in the overworld, i had stumbled across a crimson nylium, i was wondering hmm, who was in my singleplayer world, i i knew no player can access to someone else's single player world, i knew this was a bug so i reported it