I have attached two log files, if anyone wants to take a look.
One of them is called kodi.old.log, which could possibly be the first log file when I had no Ethernet after the first reboot (after power off).
kodi.log (104,6 KB)
kodi.old.log (121,9 KB)
PS:
In another thread I have now managed to find out that it is probably not the box itself that is the problem, but the NG image.
Because I also installed a NE and NO image as a test, and the problems do not occur with that.