Relates to MC-4 and MC-249200.

The bug

In the configuration provided in this ticket, an experience orb will periodically and sharply visually displace itself from its actual position for reasons unknown.

How to reproduce:

1. Summon a chicken riding an experience orb:

   /summon experience_orb ~ ~5 ~5 {Passengers:[{id:chicken}]}

   , being careful not to pick up the orb

2. Ride the chicken using the /ride command:

   /ride @s mount [UUID of chicken]

3. Optionally switch into third person to make this easier to see

Expected results

The experience orb would move smoothly. As the player and orb are moving at the same trajectory, it would remain in the same position on-screen at all times.

Actual results

Every second or two, the orb disappears or veers off into some other direction.