ᐅ Cracks in Walls – Usually No Cause for Concern or a Reason to Worry?

Hello everyone,
I have noticed some cracks in the basement (garden-level apartment).
As you can see in the pictures, they are very thin (maximum 1mm wide), but they run up the entire wall and then across to the right. In addition, there is the "large" damage, where the plaster has basically chipped away inward. I carefully removed the plaster at this spot and also took a picture.

Should I be concerned?
I have been living here for several years and I am quite sure that the cracks, especially those running up the wall and to the right, have been there for a long time. Unfortunately, the large damage is new.

Many thanks