Window is leaking! Is this normal with dry glazing?

I think there is no water in the pane. Otherwise, it would be defective and would have to be replaced. But maybe I am not seeing it correctly in the pictures either.

Now a service technician was here; he cut the corners of the seals because they went in too far and therefore the glass was not sealed properly. He said that it would be better now but that water and dirt ingress could never be completely prevented and that perhaps the seals could be completely replaced, which he would not recommend because the first seals are manufactured together with the sash and therefore always fit best.

I think there is no water inside the lens. Otherwise, it would be defective and would have to be replaced. But maybe I am not seeing it correctly in the pictures.

Yes, I think you saw it more accurately than I did. I responded based on the description referring to the more common fault; image diagnoses are trickier when on the go. Now that I am sitting at the desktop computer, I see water ingress typical for behind the sealing lips. Condensation water very rarely gets there; it is more likely rain (which also explains the late noticing, since heavy rain events are less common and "normal rain" is not quite "enough" for this).