I have an HR23 and also others including an HR20. It seems that the HR23 takes noticeably longer to respond to commands sent via the remote. The commands appear to be instantly sent and received, but acting on the particular command takes several seconds. The screen will show that the command has been received, the particular command will start, but then take a while to load the new screen, guide, menu, etc. Is this a problem I can fix? My HR23 has the latest s/w: 0x34c and the other receivers do not seem to be slow.