Just started yesterday, in the YouTube app it's no longer possible to fast forward by holding down either the seek or arrow button. In order to skip through you have to keep pushing the button to advance in 10 second increments. I tried to skip through a 5 hour video and wore out my finger! Having this issue with both my Roku devices.
It's seriously frustrating and a little infuriating. Also I miss the little corgi that would chase the ball on the progress bar when you skipped far ahead.