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Check out the v.221 Spring Blossoms Patch Notes here!
Hack detection notifying the players.
Approximately 40 minutes before making this post, I was in the Wonderoid event within the lobby room of season one. From there I did a flash jump and hit space bar to talk to the NPC Spencer before my character was back on the ground and I got a floating notification mid screen "Hack tool detected 1/2" for a second before fading in a similar way to certain quest progression notifications.
Something within the last maintenance now allows players to see the game registering when it thinks a player is cheating. I'd imagine this might be something you want to fix rather urgently given how things are currently.