Hi,
I suppose you are trying to add the image directly into the welcome page in "Survey settings / Text elements"
Either by "Insert image" or "Select image from server".
If you do it by "Insert image" you should see this line in your source code (but I know, this doesn't seem to work).
<figure class="image"><img src="/limesurvey_installation_Name/upload/surveys/123456//myImage.jpg"></figure>
So, what happens, if you enter this manually with any image on your server, like:
<figure class="image"><img src="
www.myServer.com/path_to_Image/myImage.jpg
">
With or without the surrounding <figure> tag.
I tested both in version 4.1.4. and didn't see any issue.
Joffm