Much like a PC, many times there is processing that is happening in the background that can cause a delay in response time. We are continually working on optimizations that will further improve the response times but unfortunately patience is the only recommendation we can give on dealing with a couple second delays or less. It's also important to note that when guide data is updating, you will experience a small delay in remote control responsiveness. Please wait for the download to complete and the DVR+(CM-7500) should regain responsiveness.
If the delays are upwards to 15 seconds or greater, you may be experiencing a software corruption that can happen from time to time. If this is the case, we highly recommend a factory reset to solve this issue. Below are the steps:
Menu>Settings>Factory Reset> Then wait for the factory reset to complete. Also, if you are connected to the internet, wait about 15 minutes after connecting to the internet for your guide data to download completely.