Yes it is a modeling problem, not only on the a300 but also on the 320, 330, 321. It looks like there was just a copy paste it with minor changes. If you are doing a walkaround and you are close to the fuselage looking up you can see the squashed part inwards which in real life is linear and not pressed. Also some time ago I and other users pointed out flaws in the cockpit model where cockpit windows were the wrong size(too big compared to irl) but it was ignored despite the fact that they said these issue were taken under consideration. There are so many problems with this plane and other ini planes, I know many consider inibuilds a great company but now it seems like it is just making too many planes in a short time and done wrong. My personal opinion…
this was the topic about window sizes etc. that has now been closed (about a year ago)