Factory firmware recovery produced a broken device

[moltencrux]

After having trouble following the unbricking procedures for OKD, I decided to try going back go factory firmware.
However, after restoring the mtd images and the factory firmware FW_E8450_1.0.01.101415_prod.img, it produced a broken device. I couldn't cancel the wizard to re-flash OpenWRT directly, and after setting the password, it kept forwarding me back to the login page. I tried updating the firmware through the wizard, but this didn't work and I could see through the serial console that there was no connectivity via the WAN. Finally I ran fwupdate or maybe fwupgrade after poking around and seeing it referenced in some scripts and that updated to a 1.1 version that let me log in properly. Then I re-flashed the OpenWRT recovery installer image from the web GUI (signed, as the unsigned one gave an error). I suspect this device was on a 1.2 firmware previously (although the mtd images I made seem to indicate 1.0.0.1), however my memory is a bit hazy. The device seems to be working properly now, the TF-A is at v3.4, so it should be safe from the OKD so that's all good. However, I'm wondering if writing a newer factory image might be required for some devices.