QML Image "source" property path error

I made a "Test" component for QML, in a subdirectory named "aaa",
which is an "Image" as root element. I made it change the source
property of the image on click.
I put two image files in the "aaa" subdirectory, named "img1.png" and "img2.png".
On my main.qml file, I used a "Test" component, and defined it's two properties:
source: "...path to normal image"
alt: "...path to image when clicked"
The problem is that using relative paths for source / alt properties, in order
to make it work I need to specify two different paths, like that:

source: "aaa/img1.png"
alt: "img2.png"

If I make like that:

alt: "aaa/img2.png"

file is not found, as it is searched in:

"...path to my project.../aaa/aaa/img2.png"

I would expect a consitent behaviour, either like:

source: "img1.png"
alt: "img2.png"
("Test" item source directory is always current directory)

or:

source: "aaa/img1.png"
alt: "aaa/img2.png"
(parent item source directory is always current directory)

The latter seems to me more correct.