For a few days, Kodi seems to eat randomly massive amount of bandwidth. I did not open any video, nor added any addon. The last addon I added was global search from official Kodi repository, I thought it ate all bandwidth, but when I removed it, Kodi seems still doing same. It happens randomly or when I start scanning my server for new movies.
kodi.log file is here LOG
It just keeps doing it until I turn off WIFI or force close Kodi. Then suddenly its fixed for a certain time.