Salut Fred!
SpiderBasic 3.20 is compatible with Android Launcher icon for Android v11 or less.
Android 12+ introduced an adaptive launcher icons in Android 8.0 (API level 26).
Because of this, on Android 12+, Launcher icons are smaller and surrounded by a white bleed all around.
The only solution I found was to use Asset Studio in the gigantic, awful Android Studio (which I have installed and deinstalled 2 times).
Should I reinstall it again? I prefer SpiderBasic by FAR!!! (you did a great job making it simple and fast debugging on device.)
merci d'avance!