ʙɪɢ․
Steps to reproduce:
  1. Make sure "see own chatbox" is enabled
  2. Send a chatbox message
  3. Move around
  4. Pay attention to the way the chatbox moves above your head
Actual result:
The chatbox message lags behind instead of staying directly above your head
Expected result:
The chatbox message remains fixed above your head
Note:
  • This is way more obvious when moving super quickly and jumping up and down