You need the %xn after the 104 bit. 104 downgrades to a highlighted blue, so that’s what’s making everything to the right of it bold. This looks as expected for me:
think %x100^%x101:%x102-----%x103-----%x104-----%x105--------------------------------------------%x104-----%xn%x103-----%x102-----%x101:%x100^%xn
Curious though - do you know why some of the ANSI codes downgrade to highlighted options? I grabbed the codes from the Rhost versions you so helpfully provided last summer but now that I look at it… should bold maybe be reserved for when you use %X?