changing image help

Hi. Im using stylus and trying to change a image of a website:

Image i'm trying to change:

Replacement image:

img[src=""] {
height: 0 !important;
width: 0 !important;
background: url( no-repeat !important;
padding-left: 200px !important;
padding-top: 160px !important;}

It works for like 1 second then it shows original?

Video of problem:

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