@Water_my_lawn: I’ve generated a version of 2.1.9(5) which prints debugging information on the LCD. it’s at:
http://raysfiles.com/os_compiled_firmware/v3.0/experimental/
and the firmware name is “os_219_5_enc28j60_debug.bin”. It prints a sequence of numbers separated by | at the top line of the LCD, basically containing various register values for ENC28J60. You can let me know that entire string 1) upon fresh reboot of the controller; and 2) after network error appeared, then by comparing how the values changed I may get some information about what’s going on.