I'll answer your question, because I have access to spine editor. This white thing is a condom. Short explanation - Aure spine (graphics) data is bugged a bit and it's not exclusive to your case. At least it's true for uncensored asset version which I have for 1.2.10 version. I'll check if I can fix it myself, but no guarantees. I didn't check censored assets, though, so maybe this was fixed already for censored version.
Here's a screenshot from spine editor, just to confirm what I said:
View attachment 2248366
Edit: So, I guess I managed to fix it at least. Seems to work fine with/without condoms, the problem was in her idle animation state which didn't hide condom sprite at all. I'll share edited files as a patch, just drag and drop it in game folder.
View attachment 2248555
View attachment 2248559