Canon XA-10 Video Camera – Damage or normal?

Just now I realized a problem with my (still) quite new Cannon XA-10 camera. Obvious under low light conditions and white colored background the corners getting dark – vignetting; you see it clearly on the second picture. Of course – lens hood removed, it’s medium focal length …
Question: damage under warranty or normal?

Result from several visits and discussions with the Canon Service center in Singapore:

It is a limitation of the camera. (I would call it a design problem). Workaround: use manual focus & switch image stabilizer off (if possible use a tripod).