I can confirm that this is a problem for me too when I use your save but until the appearance editor is done I won't be looking into it.
Noted. I don't suppose your tool also allows for modding move speed? The DEV tab has a ton of variables, hard to know what they all do.
Actually I looked into this and fixed it, whenever the next release is, it will work. However I'm not sure when the appearance editor will be finished. It was a slight change in the file due to the patch.
I'm not sure if you can add movement speed. There might be a way to add a PermanentBoost to the character itself for the Hasted stat but I've never experiemented with this and it's not possible to do so with the current version of my editor.