Cracks in Ytong, are these only a visual defect?

After the completion of the construction of my single-family house in 2014, cracks appeared relatively soon inside, affecting the exterior walls.

In case the question arises, we have the following floor structure:
1 cm laminate
5.5 cm calcium sulfate poured screed
PE foil
2.5 cm EPS 035DES
6.0 cm EPS 035DEO
0.5 cm bitumen roofing membrane
16 cm reinforced concrete slab C25/30
PE foil
5 cm perimeter insulation WLG 035
PE foil
Gravel

The walls are made of 36.5 PPW2-0.35 0.08 w/mK

The interior plaster is without mesh (yep, a defect!)
The exterior plaster is properly done.

I could not detect any cracks in the exterior plaster.
Due to the fact that the interior plaster is without mesh and there are no cracks visible in the exterior plaster, I have so far assumed that it can only be an optical defect.
Basically, if the interior plaster were properly done, we wouldn’t even notice the small underlying cracks.

I inspected one of the two most severe cracks with a thin knife; I can push it/stab it deeper into the wall —> see pictures.

All four exterior walls are affected, more so on the ground floor but also a few cracks on the upper floor.

What do you think?

Since the cracks are not also on the outside, I consider it a cosmetic defect. There is no painter's fleece or wallpaper on it, and therefore all shrinkage cracks are unfortunately visible.

Wait until the house is dry. Putty. Paint.

The house is definitely dry, we moved in 7 years ago.

When renovating next time, close the cracks, then it should be fine

Happens. If you don't have fleece or wallpaper on it, you'll eventually see settlement cracks. We have them too. That’s the charm of plaster walls :)