[skydancer]

strange thing and probably out of context, I'm always network boot libreelec using tftp and nfs, starting from build #716, i get mount error on boot. 
When i revert to earlier build everything is fine.
Any idea?

So #0715 is network booting successfully, but #0716 is not? Not seeing any obvious change in #0716 other than maybe the glibc changes... can you post your syslinux.cfg? 

sure.
https://paste.ubuntu.com/p/hNzyXdTjJb/