on safari iOS, there is an automatic full screen feature. When this happens, the strip that is supposed to be in full screen has a bug where the drag and move feature doesn't work properly. instead of going up, it goes right, etc. see dragMoveAndZoomImgManager.js, line 278. the condition should be completed with something like ``` !document.fullscreenElement && // standard !document.mozFullScreenElement && !document.webkitFullscreenElement && !document.msFullscreenElement ```