Sorry, but only @picmancan help with that.
Make sure the images are std .jpg or png.
Okay, Thanks. They are.
I've noticed a new type of jpg files (created by crApple for their overpriced vision junk). It's a jpg contains two images (3d) with an extra exif property. Pic8 hasn't been updated to support these, and I'm not sure about its multiple hosts.
Poal has been updated though. So the expando fallback mirror are automatically converted to regular jpg.
That's interesting. I don't use an iphone though so should not apply to me.