images on Payments User Instructions and Confirmation User Instructions

I have tried both "html coding" and "insert media" methods to add an image into "User Instructions" and "Confirmation User Instructions" on "Payments" setting page, but it modified the coding after saved change.

for example

<img src="<image location>"/>

outcome after saved
<img src="\"<image location>" alt="\"\" />

Anyone experienced this problem?

Looking for quick solution!

Thank you!