The Bug

While spectating an entity, if the spectator has a scale of any non-1 value, any attempt to teleport (to another entity) will fail and cause the spectator's view to become stuck in place, and their screen will flash rapidly if the spectatee had any movement. The spectatee will also rapidly flash in and out of view.

Dismounting as the spectator will refresh their position to the entity they were spectating before the teleportation attempt.

Steps to Reproduce

• set your scale to a value which isn't 1
• set your gamemode to spectator
• locate any entity and left-click on them to spectate them
• teleport yourself to another entity (using UUID, target selector, or username)