Not especially.Odd that a nationwide issue has only been reported by 2 people here.
How many watch and record SD channels?
I certainly avoid doing so.
The 'other side' forum is reporting that Humax have identified an issue with Aura and that mux / transport streams and are testing a fix now... (but from a new user of that site).
That Aura issue may or may not be the same for 4000/5000 boxes? My advice is to talk to Humax Support!