Not all external attachments imported

<img class="alignnone size-medium wp-image-5319" src="http://amazfitcentral.com/wp-content/uploads/2018/01/photo6050607484470668423-175x22-1.jpg" sizes="(max-width: 175px) 100vw, 175px" srcset="http://amazfitcentral.com/wp-content/uploads/2018/01/photo6050607484470668423-175x22-1.jpg 175w, http://www.amazfitbipwf.com/wp-content/uploads/photo6050607484470668423-300x40.jpg 300w, http://www.amazfitbipwf.com/wp-content/uploads/photo6050607484470668423.jpg 320w" alt="" width="175" height="22" />

Only the first image imported. http://amazfitcentral.com/wp-content/uploads/2018/01/photo6050607484470668423-175×22-1.jpg

These did not. http://www.amazfitbipwf.com/wp-content/uploads/photo6050607484470668423-300×40.jpg 300w, http://www.amazfitbipwf.com/wp-content/uploads/photo6050607484470668423.jpg 320w