Pasted selection becomes almost invisible

Software GIMP
1

Hello
I have two images - one with text form and another with signature. I’ve selected signature so that I can insert it over the top of the relevant line for signature. However when I paste it it becomes almost invisible. I attach how the signature looks like when selected and how it looks like unselected. If pasted - it becomes at least 10 times less visible

2
  1. How do you select it?
  2. Can you just paste the picture here because ImgBB seems to reencode it as JPEG and throws away useful information?
3

  1. When I open the file with signature the signature is already selected. I remember that I’ve manually selected everything and then saved the file

  2. These are screenshots of the small portions of the relevant images. Unfortunately, I am not allowed to post the full images. Anyway, I failed to figure how how to ipload images directly here

4

You can just drag and drop images into the post editor and it will automatically upload them for you.

5

I’ve reselected the text and now it works. I guess that may be I’ve saved previous selection into countour so that I do not loose it and it probably copies just the counter line and not the content in between them. Thanks for help