Lines display in the wrong colour

I've just installed MUSH client and I like it a lot, except for one issue:

The client changes the colors of old prompt and all text following them.

Is there a way to deal with this?

I couldn't find one.

There are some default triggers that match on:

< something >

These are for colouring chat channels on a MUSH.

To stop this behaviour, go into the Triggers configuration (ALT+ENTER -> Appearance -> Triggers) then either remove all triggers (click on each one and then click Remove), or at least remove the one that matches on:

^\<.+?\>.*$

Alternatively, you could "Edit" that trigger and change where it says "Change colour and style to" to read "(no change)".