11-09-2017, 07:22 PM
Possibly the way you are finishing off the paste operation.
There is the image, plenty transparency, and rectangular select, then copied same as your no 1 image https://i.imgur.com/gQQeUw3.jpg
Next image, pasted. shows same as your no 2 image. https://i.imgur.com/6FH0XkN.jpg
Now use Layer -> To New Layer (or the same is right click context menu in layer dialogue) which promotes the full selection to a layer including the transparency. https://i.imgur.com/QFp7Knj.jpg
There is the image, plenty transparency, and rectangular select, then copied same as your no 1 image https://i.imgur.com/gQQeUw3.jpg
Next image, pasted. shows same as your no 2 image. https://i.imgur.com/6FH0XkN.jpg
Now use Layer -> To New Layer (or the same is right click context menu in layer dialogue) which promotes the full selection to a layer including the transparency. https://i.imgur.com/QFp7Knj.jpg