Ah yes I can see that, I think for the actifit ones it is because of how small that running man image is, so it becomes stretched out and blurry. That's what I assumed was the case with mine too as my first picture was smaller than the size shown on twitter. Though it still happens after I changed the image to a bigger one and shared to twitter again. So it is weird. I see your other posts do show the picture just fine indeed.