Well, I'll try.
FYI the 2020.10 u-boot is also partially broken for the Nanopi Neo 2 board. It also does not read the environment file, without throuwing error, however, and the u-boot console does not work.
All that was working in older releases of the u-boot: have just checked for Nanopi Neo with 2019.10 u-boot.
How can I compare 2019.10 and 2020.10 sources?
Regards!
NJ