So I have a Roku Ultra and this Fast Forwarding too fast in Amazon Video just started yesterday. It appears there was an update with Amazon as the whole app has some changes in appearance. The Roku remote works just fine in Netflix and other apps so I feel like the issue is with Amazon not Roku. I will say I switched over to my Firestick and the Fast Forward does not go too fast so now I’m confused as to who is responsible for the change. I haven’t seen anything in regards to a fix but I hope mine goes back to “normal” soon.