Short but some times several times a night then not at all for awhile. It is usually when multiple recordings are also taking place. Once I figured it out, I just wait. I think it was probably an issue with the hard drive but I have not had the issue lately and it just occur to me that 2.2.20 may have fixed it.
An other issue is that some times after I have not watched for awhile, my selection does not load until I hit the back arrow and select the episode again. It is like the hard drive is sleeping and needs a wake up call. Not a problem because work good once I click out and back in.
I have only had the loading message a few times and backing out snd signing in seems to resolve it for me.
HD Elements with External power supply.