Class colors not working since 5.1

[Bizerk]

Since the patch I can no longer tick class colors in the chat settings without any addons, only works with prat3.

[Deleted]

noticed it too.
i'm using chatter atm and also having issues with classcoloring in chat frame.
don't tested it with my addons if there are any problems.

[Bizerk]

It could be because of the new instance chat, but still it doesn't work even without addons.