Originally I tried to use DietPi and opened a bugreport there: https://github.com/MichaIng/DietPi/issues/7715
But DietPies support for the ZeroPi is based on armbian, so I tried this directly:
oldest image not working: Armbian_community_25.8.0-trunk.338_Zeropi_bookworm_current_6.12.35_minimal.img.xz
bootlog12.txt
newest image working: Armbian_community_25.5.0-trunk.256_Zeropi_bookworm_legacy_6.1.104_minimal.img.xz
bootlog13.txt
Does anybody have an idea what it could be?