It doesn’t actually say whether he was bobbing up and down on the waves.
Although I suppose the canonical explanation would be, He controls the water so that the part around His feet holds still. Because he’s also known to have calmed the storm.
In that case though there’s active motion to move, and the ability to do so implies friction to push off against a surface. If he stood still then that same friction should carry him downstream.
Well the story of him walking on water was of him walking on the sea during a storm, so it definitely had a current, so I think he would stand still
It doesn’t actually say whether he was bobbing up and down on the waves.
Although I suppose the canonical explanation would be, He controls the water so that the part around His feet holds still. Because he’s also known to have calmed the storm.
In that case though there’s active motion to move, and the ability to do so implies friction to push off against a surface. If he stood still then that same friction should carry him downstream.