Locked Chests & Containers is a Minecraft Bedrock add-on that allows players to lock chests, barrels, and shulker boxes by renaming the container to Lock: <player1, player2 ...> before placing it. This feature ensures that only specified players can access the locked containers. Players must include their own username when renaming; otherwise, placing the container will be blocked.
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Updating dependencies in manifest file for 1.21.30 release





estamos en la version 1.21.113
The intent was for usernames to be case insensitive, just missed one place where they were compared.
Now regardless of the case of your username and the case of what you write in the Lock tag, it should match for both placing and opening.
I'll have a fix in for the case issue soon.