My remote for 4000T has always been slow and something I have accepted, but after I purchased the Amazon TV Fire Stick I can now see just how very-very slow the 4000T remote is compared to the Fire Stick Remote.
Channel 4 CatchUp for example the 4000T goes at a snails pace with delay between each button press. Fire Stick flashes through to a selected program without any delay at all.
Humax solved this problem for me by replacing the remote under warranty (less than 2 years old). They were brilliant and sent the replacement by post the following day. Can’t praise them enough. Machine now works perfectly.