Apple released iOS 17.2 today, and I've noticed that it has started to show the wrong Safari extension icons in some places for some extensions. The same happens on iPadOS 17.2.
By design, each Safari extension has two icons: (1) an app icon, in full color; (2) a Safari toolbar icon, black and transparent template. Below are the app icons in Safari Extensions Settings, the same as before iOS 17.2.

And here are the Safari toolbar icons, also the same as before.

For some bizarre reason, iOS 17.2 has started to substitute the toolbar icon for the app icon in some cases, for example in the Safari Manage Extensions popup.

It looks even worse in dark mode! The StopTheMadness and StopTheScript template icons almost disappear against the dark background.

Also bizarrely, Homecoming for Mastodon, which is also a Safari extension, still has its app icon. (StopTheFonts is a Safari content blocker rather than a Safari extension, so it doesn't have a second, toolbar template icon.) I couldn't find an older screenshot of the full Manage Extensions popup, but here's an older screenshot of Tweaks for Twitter that has its app icon rather than toolbar icon.

iOS 17.2 also shows the toolbar icons in the Settings for some individual Safari extensions. Here are before-and-after screenshots for StopTheMadness and StopTheScript.




Yet Homecoming for Mastodon still has its app icon in Settings on iOS 17.2.

I have no idea why this strange behavior has started to occur, or why it only affects some Safari extensions.
Since I'm participating in the boycott of Apple's Feedback Assistant, this blog post will be my bug report.