Scaling multiple IO masks fails to save

> Anki Version: 25.07.3 on macOS
> Oftentimes, scaling, duplicating (or doing anything) while having multiple Image Occlusion Masks selected leads to those masks’ positions and sizes failing to save.
> To reproduce, select two rectangles in the IO editing menu, and scale them together.
> https://vimeo.com/1103611736?share=copy
> (I uploaded this video as an escaped Vimeo link since the forums blocks me from directly uploading it or posting an actual link since I’m a new user.)
> This is almost identical to a bug reported in the past, but that bug was supposedly fixed in 2023.

Originally reported on https://forums.ankiweb.net/t/bug-scaling-multiple-masks-in-io-fails-to-save/64392