The Bug:
Subtitles don't function correctly and are delayed in multiplayer worlds.
Steps to Reproduce:
Get two players and label them "Player A" and "Player B".
Ensure that both players have subtitles enabled in their accessbility settings.
Get "Player A" to create a world and open it to LAN and have "Player B" join them.
Get "Player A" to place a block in front of "Player B" every two seconds.
Have "Player B" look at the subtitles overlay and observe if the subtitles are delayed.
Observed Behavior:
Subtitles don't function correctly and are delayed in multiplayer worlds.
Expected Behavior:
Subtitles would function correctly and would not be delayed in multiplayer worlds.
I am able to reproduce the reported behavior. It was introduced in 24w19a, presumably alongside the fix of MC-267981. This issue is not limited to Multiplayer, but can also be reproduced in Singleplayer.