i don't have answers for you about photobucket, but i abandoned them over a decade ago in favor or
www.imgur.com because pb exerts too much control over images and their viewing, whereas imgur doesn't. imgur is also totally free for all of their services.
also, be aware that mobile computing devices (smartphone/iphone, ipad/tablet, etc) work vastly different from actual, real computers - desktops, laptops, notebooks. if something doesn't appear to work with a mobile device, try it in a real computer and it usually works just fine. the problem is usually that mobile browsers just work and "think" diff'rently from real computers. bringing the mobile device issue you have back to the device's manufacturer might get the problem resolved.