Hi,
I've tested a few F22 beta images on Orange Pi (similar to Banana Pi).
I noticed that it was not possible at all to pcik a weak root password.
Pressing done a 2nd (or 3rd) time did not help.
For testing (where I tend to use a simple password) this is not convenient.
BTW noticed that even passwords like 1qazxsw2 are in the dictionary.
Also it might be (I did not verify this and already had overwritten the sd card) that the u-boot bin is a different size; I struggled a bit here,
Somehow I ended up with two versions:
-rw-r--r-- 1 frans frans 352800 Apr 26 10:25 u-boot-sunxi-with-spl.bin.f22
-rw-r--r-- 1 root root 352848 Apr 26 12:01 u-boot-sunxi-with-spl.bin.f22a
The f22 one works.