I notice you’re asking for a “long write-up” regarding
Before deploying technical fixes, it helps to understand why these specific files fail during graphic rendering. PNG (Portable Network Graphics) assets rely on a 32-bit color depth structure: 24 bits for color channels (Red, Green, Blue) and 8 bits for the Alpha transparency channel.
Usually disabled for web assets to keep file sizes efficient while maintaining maximum pixel clarity. The Role of Fandom and Asset Sharing Platforms
While self-fixing is useful, the community has compiled a definitive list of repositories where the already fixed files live. You should avoid random thumbnail sites (like PNGWing or PNGEgg) because they often host the broken versions.