Subject: Strange "Herobrine Joined the Game" Message in Minecraft 1.21.81

Dear Mojang Team,

While playing Minecraft Bedrock 1.21.81 in single-player Survival mode on Nintendo Switch, I saw an unexpected message in chat:

"Herobrine joined the game."

This was not multiplayer, and I am not using any mods, datapacks, or command blocks that could have triggered this message. It appeared randomly while I was playing, and I have never seen anything like it before in an official Minecraft version.

Could you confirm if this is a known bug, a text error, or an unintended occurrence in 1.21.81? I just want to verify whether this is a glitch or something worth investigating further.

I also saw Herobrine in the game—I only saw his glowing white eyes while I was strip mining, barely visible in the darkness of my tunnel. There was no visible body, just the distinct white glow, making the sighting especially unsettling. I was using a motion skin, but I am unsure if that had any effect. Since I was on Nintendo Switch, I do not have debug logs, but I do have a screenshot of the occurrence, showing the unexplained glowing eyes in my mining tunnel.

Thank you for your time.