Hello!
When I add the plugin in version 1.15.2, it will change the color of my flag.
This is a photo without the plugin:

This is the photo after adding the plugin:

Version: Fabric Loader 0.7.9+build.189-1.15.2

I'm aware of this issue, but it's nice to have a bug report on it now I guess

Hey there, can you please state which version of multiconnect you are using? I can't reproduce this bug. I tried connecting to servers on 1.15.2, 1.14.4 and 1.12.2 none of them had this bug (tested alongside vanilla clients on those versions to make sure the banners were the same colour)

The version I use is 1.2.2
Client version: Fabric Loader 0.7.9+build.189-1.15.2 (I didn't install OptiFine)

Try multiconnect 1.2.4

I reproduced it - it happens on the pattern but not the banner base, when connecting to 1.13 or newer

Can confirm that this issue is fixed in 1.2.4.