ᐅ Is a glass breakage acceptable within the mold?

Here I am again:

The windows are installed. Unfortunately, there were issues such as the attached glass damage, which cannot be photographed clearly with my mobile phone camera once installed, as the image always becomes blurry (glass is difficult to photograph).

This blemish is clearly visible from both inside and outside at a distance of 2 meters (6.5 feet). Do I really have to accept this according to regulations and case law? At least that is the information provided by the representative of the window supplier regarding acceptance.

If so, I would find that unfortunate, as I would then have to purchase a new pane at my own expense... 🙁.

Thanks and best regards