Not going to lie this is very amateur stuff. Doesn't seem like they even tested the build before releasing, very easy to find. Seems that moving turns off a programed timer to prevent such spamming. Reminds me of why you can play older versions on "java edition" in the first place. Please be more thorough in the future mojang, I was really looking forward to playing this tonight.
This needs to be a top priority to fix, this nearly renders survival unplayable.