[op6-enchilada] Doesn't boot after testing pmOS

Flashing Mobian on my enchilada doesn't work anymore:

• official mobian-qcom-plasma-mobile-20250126.boot-enchilada.img doesn't work
• official mobian-qcom-plasma-mobile-20240922.boot-enchilada.img doesn't work
• official mobian-qcom-phosh-20241215.boot-enchilada.img doesn't work
• locally built SSH-enabled image mobian-qcom-plasma-mobile-20250210.boot-enchilada.img doesn't work, nor it's possible to login via SSH (PC complains about IP configuration not complete)

For all of those, after flashing boot and rootfs images and fastboot reboot, device reboots, the usual screen "The bootloader is unlocked and software integrity cannot be guaranteed." appears, then disappears and nothing more happens, screen stays black. Device does not even reboot for the filesystem resizing.

I've also tried playing a bit with the console=ttyMSM0,115200 loglevel=7 cmdline parameters in the boot image, with no luck.