Problem with fast forwarding

WIthin the past couple of weeks, I have been experiencing an issue when fast forwarding.   As a typical example, I am watcing a recorded show (OR a show that is currently recording) and I fast forward say 5 minutes.  I will get the clocking icon - then eventually a message that says there was an error fast forwarding and to try again - then I am taken back to where I was when I originally requested the fast forward.

I have rebooted the modem, router and my Roku-enabled TV without it helping the situation.    I am NOT experiencing this situation when running other streaming services (Netflix/Prime/Hulu).    This has been occurring constantly for the past few weeks.  It has effectively eliminated my ability to fast forward.

Any thought?   Thanks