
I added these lines in progdvb.ini: no change after a full scan. I am not even sure it was taken into account by progdvb (as I understand, this parameter should add a 2 second delay between each TP scan, isn't it ? => it does not)
Regardless to the progdvb.ini modification, there is another important info that I missed to provide and that could help finding the origin of the bug:
the channel captions are well displayed in the scan preview window (during scanning). This is after the end of the scan, that they are not anymore well displayed in the channel list => problem seems to appear while progdvb is updating the channels.dat file.