Ikea Pax Auli/Färvirk doors - Drawers hit against the sliding door

The drawer bumps into the front sliding door. This, in turn, bumps into the rear/ inner sliding door.

First, you need to find out what the front door is hitting against on the back. Error analysis comes before error correction.

The front door collides at the top with the guide/the metal bracket of the rear door (see photo, unfortunately rotated 90°).

The rear door, in turn, can be slid so far to the right that it ends about 0.5 from the outer edge of the outer wall on the outside. (see photo, unfortunately rotated 90°)

This is approximately the dimension by which the front door cannot be opened far enough to allow the drawer to be opened.

Now we are getting closer to the matter. The back door has to move further to the right. Now the question is, what is preventing that. Maybe it doesn't fit at the top into part 123078?

Yes, the corresponding "nipple" is located directly in front of the plastic beak you mentioned (see photo)

Now it’s getting very strange. In the picture, the door aligns perfectly with the frame, which it did not do in the other one. Or is that only at the bottom because everything is crooked?