The air-walking that the interaction between the heimdall amulet and the rod of the bifrost is a little wonky due to the bifrost tiles only being made while you occupy the exact space. So, as you are walking (or running) in air, you jitter as you fall for a split second before the tile gets made under your feet.
A fix would be to always make a (non-destructive) 3x3 or 5x5 around the player, similar to water/frost walking.
The air-walking that the interaction between the heimdall amulet and the rod of the bifrost is a little wonky due to the bifrost tiles only being made while you occupy the exact space. So, as you are walking (or running) in air, you jitter as you fall for a split second before the tile gets made under your feet.
A fix would be to always make a (non-destructive) 3x3 or 5x5 around the player, similar to water/frost walking.