How to resolve scale problem of images ?

So I have a trouble since a few months with User interface, I have made a simple image but when I use it in the engine, the image looks completely different and scaled weirdly.

Here is my image, how it is supposed to look :

240692-problem.png

And here is how it looks in the engine , and in my widget blueprint :

Hello friend, if you import the same image as PNG you have the same problem?

yes, the same thing happen, and the background become green by the way.

have you tried changing the tiling method? and can you post the picture itself so i can test to see if i can replicate the issue.