They have a grey-ish top texture and they keep it when endermen place it down. It keeps this texture even after a block update and drops a grass block when mined with silk touch.
I am using the fabric mod with MailiLib, MiniHUD, and Litematica but I don't think they are the cause. Please correct me if I'm wrong, though.
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We're tracking this issue in MC-124320, so this ticket is being resolved and linked as a duplicate.
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