I have this exact same issue with the photo gallery. I was scouring the internet looking to see if anybody else was having a similar problem, I'm glad I'm not alone! And I completely agree, please add the ability to toggle off this auto-motion photo preview. If I want to see the motion photo I will press the motion photo button. I don't want to see the preview blurring all over the screen for a second before I can see the actual photo I took each time I look at another photo.
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