[Abba2]

Your video looks like it loaded the xmltv and m3u files but check in
userdata\addon_data\plugin.video.iptv.recorder
to see if they are correct.
The xmltv.db file should be about the same size as the xmltv1.xml file.

Then look in kodi.log for some kind of block of error messages to do with plugin.video.iptv.recorder

Something is not linking the m3u streams to the xmltv channels.

You can use something like this to look in the xmltv.db file and see if it has loaded the data correctly.
https://sqlitebrowser.org/
See if the "streams" table looks like the m3u file.
The "channels" table are the channels from the xmltv file.
The id columns should match the tvg_id column in the streams table.

Usually missing program data is due to either ids that don't match or some kind of unicode file format problem. 

I'm back. Looked for what you said, and the .temp have the same size, but not the other.. 

That looks like it might have got stuck half-way through reading the xmltv file.
Are there errors in kodi.log?

It is also a huge xmltv file.
Some devices just can't cope with that much data.

Don't seem there are errors..

Do you've a good working EPG for Italian channel?!