Just updated to the most recent version (1.16.4 0.10.0-dev.20210309.164640) and the chat timestamps seem not to work for chat messages. Other messages, like "x joined the game" or "Teleported x ..." and other debug/info messages have timestamps attached, along with /say and /me, but normal chat messages from players don't anymore. As in #114 I checked for other conflicting mods that edit chat, and disabled them. The issue persists. A screenshot is attached: https://imgur.com/a/9k45Lxs

I found the culprit: watson
Not sure what that means for watson, the person who created it certainly seems inspired by you. They even depend on malilib (could be the issue).

It still works the same for me, and I haven't touched that part of code in a long time, AFAIK. Did you remove all other mods than mine to test?

@vacla close this with Watson#15 when ready I guess.