FYI
Same RASPBERRY PI 3 (MODEL B) now running LibreELEC (LibreELEC-RPi2.arm-7.0.2.img.gz) works like a charm on same network.
Therefore, my conclusion is... there is an issue with the combination of RuneAudio_rpi2_rp3_0.4-beta_20160321_2GB.img + linksys lrt224