allwinner/nanopi neo boot issues

[Daniel Braniss]

hi,
with the latest current r338243 no longer boots via ubldr, efi does
but with overlays I have to manually enter the root partition.

this is where it hangs via ubldr:

Autoboot in 8 seconds, hit [Enter] to boot or any other key to stop      

Loading kernel...
/boot/kernel/kernel text=0x8a0950 data=0xae160+0x184520 syms=[0x4+0xa6d70+0x4+0x109f17]
Loading configured modules...
/boot/entropy size=0x1000
/boot/dtb/sun8i-h3-nanopi-neo.dtb size=0x601b
Loaded DTB from file 'sun8i-h3-nanopi-neo.dtb'.
Kernel entry at 0x42400180...
Kernel args: (null)

older - r337232 - boots fine,

any ideas where to look?