Oh, and another thing I've found, submissive mode seems to load in her eyes, mouth, blushing, and her restraint textures, but not her body. Instead there's just her overworld sprite in a box.
Thank you so, so very much for this report! Another player has reported this issue but I couldn't replicate it, so I assumed it was a one-off issue. I will try more rigorously to replicate this now that I know it wasn't a fluke!
Edit: Pv1.01 should remove this issue. Since it's a rather major graphical issue, I saw fit to publish a fix immediately.