HDR isn't recording the 90 minute buffer of the channel it is set to after it is turned off?

Which receiver specifically? Have you tried pressing the red reset button on the front behind the door that says ‘PUSH’? Does this behavior occur on a specific channel or all of them? When did this issue start, have there been any recent changes that could have caused this?

Thanks for responding.  The receiver doing this is an HR24.  When I turned it off it stops recording the channel it was on as the other 3 receivers do.  I guess I noticed it a couple of weeks ago.  There have been no changes involving this receiver recently.  I was just about to try reseting when you responded.  I did the reset and that did solve the problem.   

P.S.  I am real familiar with the reset button as I have had Directv for many years and with 4 HDR's, several with external hard drives, they keep me busy.  I do thank you for the suggestion and the quick response.!

Not a problem @Depdad 

I'm glad the red reset button helped you out with your HR24. These receivers are my personal favorite and I agree many issues just involve the red reset button, as the Receivers sometimes need a refresh to clear out the 'cobwebs,' and then all is good.