Thank you screen has incorrect image

I have our thank you screen set with the same image as our form, yet for some reason it is showing a sunset image instead. Can you help me resolve this?

Please go to the form designer, there you need to remove the wrong image background:

Then, re-upload the correct image, so it will be shown in your Thank You page:

Here is my cloned version: https://form.jotform.com/70256321720951 

You can simply clone it and use it if you want to: https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL 

Let us know if you need more help.