MCAlexisYT

I just saved a multi-layered image to a .png, and this time it asked me to "flatten" the image. This seems to be some kind of one-off, very hard to reproduce bug, if it even is one at all. edit: fixed a typo

Update: Even after merging all layers into each other, it still saves the image as an invalid .png file.

First off: Yes, I am using the latest version: 5.0.12. Context for how I found this bug: I found a weird discrepancy in the icons.png file in the files of Minecraft: Java Edition. It's that there is a duplicate version of an armor bar icon (as shown in image 1). So I made a version of it in an ugly but effective resource pack to easily tell which one is showing or not. Then I loaded the resource pack only to find that it shows up as a missing texture. (as shown in image 2) How did I know that, as the title says, saves the .png file as a .pdn one? I renamed the fake .png to a .pdn file and Windows finally recognized it. (it showed an actual image rather than the Photos app's image icon.)