Any item that doesn't break a block when used (trident or sword) seems to stop your pos changing but keeps your momentum if you're in creative. If you get a clicker fast enough, you can stay exactly still, and if you are suspended in the air, you gain momentum, then when you stop, you get thrown to the ground. Mounts also become RC cars and you aren't dismounted
Thank you for your report!
We're actually already tracking this issue in MC-157436, so I've resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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