When renaming a command block in the Anvil to /a /p or /r it does not do /say commands with the nearest player's name, all names, or a random name, but says [@p] or [@a] or [@p] as the "chatter's" name.
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That's an unrelated bug - it has nothing to do with renaming, and this report has nothing to do with scoreboard commands. This isn't a duplicate.
Duplicate of: MC-8958 - Please use the search function to see if your bug has already been submitted.
Currently over 50% of tickets are being closed as duplicate.