Lifeboat Survival games thinks I'm trying to fly?

So when I go onto Lifeboat survival games and go to a hunger games server, about one minute into the game, I am kicked by admin because flying isn't enabled on the server. I am so confused because I never tried to fly and this has only been happening recently to me, about since the new minecraft update came out. Is this just a glitch? Am I doing something wrong? Has this happened to you guys too? Help?!

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