this issue will only occur the first time you perform this manual call to the equip scene. if you exit the scene and manually call the equip scene again, then you will notice that the images load properly.
by calling the scene manually from outside its normal operating conditions (entering it via the menu) you are bypassing the code which loads the necessary images and caches them for future use. this is why the images will not appear properly the first time you make this manual call to the scene, however all additional calls will use the cached images from the first manual call and everything will display properly from here on out.
if you intend to bypass the normal operating conditions of the equip scene, you will need to manually load the images you expect to use prior to manually calling the scene.