I was called to fix the wrinkles in the hallway and the living area.
The original installer came 3 times to stretch the carpet. I am not sure what they did, but obviously they didn’t stretch the carpet, for sure.
Owner finally decided to call me. The job involved, some furniture moving and adding extra tack-strips to secure the carpet in place.
Hallway needed to be cut open, and reduce the amount of carpet lying on the floor (which was causing the bubbles). After seaming the carpet and stretching a bit more, got rid off the wrinkles.