When you jump and hit a sword in creative it tends to move you back a little everytime you hit also its harder to jump up a block. (And i dont think i saw someone post anything about this if someone did im really sorry.)
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Asteraoth
Thank you for your report!
However, this issue is a Duplicate of MC-157436.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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