I just followed your protocol and con confirm that the same thing happened for me. I am also on the same version of KNIME and operating system. Sorry I can’t offer a solution but wanted to let the forum know that the problem is reproducable.
thanks for the report and detailed steps to reproduce!
I can confirm that it is reproducible in 5.4.4 and 5.3.3 using ModernUI. Restarting KNIME with the to-be-modified workflow open seems to be crucial. If you create a new workflow, edit, save it, edit it, save-as and close and open the saved-as copy, it contains the changes.
I was unable to reproduce it in 5.4.4 using ClassicUI.