Clothing morph dials gone after loading a previously-saved scene

Abendwind

I'm afraid I may be missing something terribly obvious here, but I'm occasionally running into the following problem:

After autofitting clothing from a previous generation to a figure, saving my scene and reloading it, the piece of clothing in question is missing all unused morph dials. Morphs that were actually applied before saving are kept perfectly intact, but those sliders left idle are gone once I load a previously-saved scene.

This is seriously puzzling me. Yes, "Show Hidden Properties" is checked, and no, I can't seem to nail it down to any specific figure or clothing item. The only thing I'm certain about is that it happened with native V4 clothing autofitted to Genesis as well as native Genesis clothing fitted to G2M, but only sporadically.

Any suggestions on this would be very welcome.