Logs: https://pastebin.com/Y9A09bgF

How to repeat the issue:

1. /party create Name
2. Tablist colour changes & changes priority of the tablist groups and moves it to the top.
3. Leave the server & rejoin
4. Tablist colour goes back to normal & priority of the groups.

Config: https://pastebin.com/S3Tegmp0

Thank you for the report, so the problem is only when you create a party and if you quit and re-enter it will be fixed?

Unfortunately, SortedTabList is not well developed and it can make some problems.

I changed the tag system with Parties 2.2 so, just wait for the next release ;)