Experience orb positions desync severely and abruptly correct themselves

When you kill a mob, or use experience bottles the xp orbs movement will stutter a lot. This seems to be due to desync between their physics on client and the server. This seems to have been introduced in 1.21 Pre-1.

Reproduction Steps

Method 1

• Drop an experience bottle (it's more severe if you throw it against a wall)

• Observe the orbs movement

Method 2

• Kill a mob & quickly switch to spectator (so you don't absorb the orbs)

• Observe the orbs movement

Observed Results

• The XP orbs abruptly change position

Expected Results

• The orb movement would be fluid and uniterrupted