I've done this hundreds of times before with no issue. Now for some reason, I if I import an image sequence into Photoshop, it does not showthe animation. Photoshop does correctly convert the frames into a Video Group Layer, but I cannot scrub through the timeline and when I try to save it as a gif, the playback is greyed out. Can someone help figure out why?
Before you convert to a video layer - what does your layers panel look like after importing the image sequence? What happens if you use Frame animation?