So I decided to raise another complaint, and actually to BTs credit, I was called by Anish from BT, who had reviewed my complaint and already arranged for a new box to be sent out. Actually really good service from BT!!
Well it's certainly progress. Do let us know how you get on with it, and what model of box BT sends you. I'm still inclined to think this is a bug/weakness in the code rather than a fault - but it might have been eliminated on a later/different model of box.
I've just had a check of mine and it has lost channels yet again at some point over the last few days. Showing 106 channels, and 133 after I re-tuned it just now, so there are obviously more channels being lost than I typically notice.
BT must have changed since I spoke to a hghly intelligent person in India with excellent English and good communication skills (not) who was working from a flowchart and totally unable to make any decisions but the box was one day out of warranty. Stupidly I bought another BT/Humax from Argos, of course it failed within a day or so out of warranty.
If any moderators are reading this why is this still marked as solved when very clearly it isn't?
Yes, I also worry that my the new box will have the same issues, as it could well be in the metadata being pushed out to the boxes over the network and not the box itself - but my hope is that a newer version of the box may have new software or something.. so it's really a fingers crossed situation. May contact Humax and see if they know what's going on if that doesn't work.
The OP may well have marked it as resolved as the attenuator initially appeared to fix the problem for him, but it came back. It will probably need either him or the moderator to unresolve it.
It will certainly be interesting to see if these boxes are able to manage this disruption on a nightly basis..