[ME(?)] Bug causing ballooning file size with each save

[Tarried]

There are cases where the ME data gets saved to the .png file multiple times, and with each save, the data repeats, doubling the file size with every save. I've no idea what's causing this to trigger.

Demo scenes

In the demo scenes above, I have a cube with slight ME adjustments. On first save it's 85kb in size. By the tenth save/reload in a row, it's now 10Mb, and will keep doubling in size. I've had scenes ballooning in size to triple digits MB just because they had a few of such buggy items.

Tested in base HF 3.32, and bug still occurs. This never happened before 1-2 months ago for me, so I'm guessing it's a recent update.