I just ran into this problem with this disk in the USA and opened a "Feedback" support comment in DVD Fab. Unfortunately I did not send logs, and I don't have the ID number. I looked for the "repaired AC3 track" and see three, and none of the AC3 tracks are flagged with Cinavia, although the Disc Information in Fab does show Cinavia is present. Probably a simple solution here on my end, and I'd appreciate your feedback. Thank you!
AceExplorer
play the copied dvd disc on a dvd player that doesn't have an internet connection
and see if you still get the muted sound.