I was building a kelp farm and was making a place where i could stand to take all the kelp and suddenly my camera position started floating. I knew that it was the camera position because if i looked at the bottom of a block it would place and remove blocks below it and if i went into third person view both the camera position and my player would be at the correct height. The camera position would also fix itself if i was in a two block high space. I also know that it was not water because when i placed two signs the camera would stay at the same height. I also noticed that if i went out of the small space i was in the camera would fix itself.