Information

Full output of /ess version:

09:12:38] [Server thread/INFO]: CONSOLE issued server command: /ess version
--
[09:12:38] [Server thread/INFO]: Server version: 1.13.2-R0.1-SNAPSHOT git-Spigot-a1f2566-282dad1 (MC: 1.13.2)
[09:12:38] [Server thread/INFO]: EssentialsX version: 2.15.0.55
[09:12:38] [Server thread/INFO]: LuckPerms version: 4.3.39
[09:12:38] [Server thread/INFO]: Vault version: 1.7.1-b91
[09:12:38] [Server thread/INFO]: EssentialsXSpawn version: 2.15.0.55

Server log: https://gist.github.com/Ironic8b498/c861d108f666c609c0cf444218db90bc

EssentialsX config: https://gist.github.com/Ironic8b498/592d2bc985f8109f6e64edab75bc745f

Details

Description
custom-join-message: "" display an blank line in chat
custom-quit-message: "" display an blank line in chat
essentials.silentquit and essentials.silentjoin still get blank line if using custom messages

custom-join-message: "none" & custom-quit-message: "none" you get the spigot default join/leave message.
essentials.silentquit and essentials.silentjoin works for no messages or blank line in chat.

If I wanted to use custom messages I can't due to it not working

Steps to reproduce

Expected behavior

Screenshots

Thanks for filing a bug report.

essentials.silentquit and essentials.silentjoin still get blank line if using custom messages

According to your config, you don't have allow-silent-join-quit enabled, so this will happen. Set that option to true to use silentjoin and silentquit.

Unfortunately, this is a duplicate of #991.