I also have the audio problem.
MAG256 , 3 months old, latest OS / f/w
The provider says it is a codec issue and I have to contact Infomir to upgrade my box OS with working codecs.
V220 3rd August 2018 - the latest as of 25th August 2018
Is this an Infomir issue or the provider with encoding 'issues' / differences of the video ?
Help appreciated !