The bug

When teleporting a display entity, any player riding on any of its passengers will experience heavy camera jitter towards +z direction.

Steps to reproduce

1. Summon an item display with any passenger
2. Ride the passenger
3. Teleport the display entity to itself

Commands used in the video:

summon item_display ~ ~2 ~ {Passengers:[{id:"llama",Silent:1b,NoAI:1b}],item:{id:"glowstone",Count:1},UUID:[I;0,0,0,2]}
execute as 0-0-0-0-2 at @s run tp @s ~ ~ ~