All images are stored in resource files.
texture/diffuse map set in UIP with:
<Add ref="#someref" sourcepath="foo/bar.astc" subpresentation="" />
Same texture is then replaced via code with
presentation->setAttribute(someref, "sourcepath", qrc:///foo/bar.astc).
When using non-delayed loading all the images load and work(?not loaded twice?).
When using delayed loading the images which are being replaced with setAttribute with having differing name (the additional qrc:///) are not found by mapping functions and get drawn white.
This is somewhat a client side problem with mixing conventions with absolute and relative paths. But since it works with non-delayed loading it is confusing for the user.