THIS ISSUE IS FIXED FOR ME. I PROBABLY MADE A MISTAKE COMPILING

If you use Scoreboard#setPrefix it doesn't work.

If you only set a suffix, the suffix works. If you set a suffix and a prefix, your prefix is the suffix. Please use the included TablistPrefix plugin for reproduction purposes

1.13 -> https://cdn.discordapp.com/attachments/469045195174838283/469129592058281985/unknown.png

1.9.4 -> https://cdn.discordapp.com/attachments/469045195174838283/469129073520672768/unknown.png

Source: https://hastebin.com/uguqesagez.java

I've included the .jar file I'm using for testing.

PPS: Bug reports which do not 1) contain a declaration of testing in Vanilla and without plugins, or 2) in the case of plugin API bugs, contain a minimal reproduction case (source + jar please) will be closed. Bug reports must contain step by step instructions to reproduce the bug from a clean server install with no assumptions or prior knowledge. Also make sure you include the full output of /version in your report. Please copy and paste this statement to the bottom of your report to indicate that you have read and understood it.