I purchased and moved into my first home about 3 months ago. It's originally a home built in the 1930's. An investor bought it last year to completely gut and flip the property. A few of the walls were original, but for the most part, they redid everything.
Recently, I began to notice some cracking in the drywall on the stairwell to my basement where the wall meets the ceiling (pictures below). Every now and then, I'll see small pieces of the drywall on the ground from cracking. The stairwell was completely rebuilt and did not exist in the original house, so it's new.
I'm a 1st time homeowner so I don't know what's normal. Is this a cause for concern or is this normal? If it is a cause for concern, who should I call to take a look at it?
Thanks in advance for the help/