//Change your code for last message to this. It should work.

		// dont parse system messages
		if($ele.hasClass("robin--user-class--system")){
			if(line.indexOf("ratelimit | you are doing that too much") !== -1){
				var channelTrim = tabbedChannels.channels[$(".robin-filters span.selected").data("filter")] + " ";
                $(".text-counter-input").val(user_last_message.slice(channelTrim.length));
			}
			return;
		}