The two channels that are causing your trouble are in the DAB radio band, so I expect the problem is some noise ingress somewhere in the VM network local to you. This type of problem is difficult to trace.
Tudor There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2
@Steven_L - thanks for the info, will check again after the fix date/time but am not optimistic as this has been going on a long time with the fix date always being moved into the future.
@Tudor - thanks for your input, that's interesting. Sometimes the problem is on channel 4, other times on channel 12 - are they the two channels you are saying are channels associated with DAB radio, or are you saying they are the current problematic channels 4 and 5?
Just popping past, I can see that the SNR issue has been pushed back further, this is due to be resolved today, however as you have noticed by now, they are susceptible to being pushed back as they are notoriously difficult to find.