Sometimes in the node tool, designer does not detect the existence of the curve being under the cursor. Likewise when using either the option click to straighten a line or the control click to remove a segment, it doesn't work in the areas that are not detected as part of the curve. Temp.afdesign
In the attached drawing there is a loop off the bottom right corner, if the cursor is traced around the circumference of that loop only a little more than half of it is recognized as existing by the node tool.
AD 2.0.4 is being run on a 2020 27" iMac using Ventura 13.3.1.
I am assuming this is not by design.