Pi3+, USB drive, cannot update host past 4.20


I have a pi3B+ which I use with a mSATA hat via USB, which works fine with HAOS 4.20 but pressing the update button to v5.12 (in the past) or now v6.1 doesn’t succeed and I have to reinstall 4.20. I also tried clean installs of v5.12 and 6.1 but neither of those worked. I also tried with by copying “fixup.dat” & “start.elf” from 4.20 to a 6.1 fresh install (more active lights on the pi - including the ethernet, but no web-interface appeared. I also tried with the bootcode.bin on an otherwise blank sd card (no luck, maybe that was for pi4’s only).

Thanks for your help,