When using LIST to view a text file in a console window, the mouse cursor moves only slowly in a jerking manner. It's very difficult to get the mouse cursor to go to it's intended target. The entire screen is effected, not just the console window. As soon as I exit LIST, the problem goes away. The problem was in build 21.0.17 and continues in build 20. The problem doesn't occur in a TC tabbed window; only in a TCC console window, and only occurs when I'm using LIST. In TCC 20.11.40 LIST works perfectly.