Issue
After leaving the SOWA upside down, resting on something on the front, a dent has been formed in the fabric/foam front.
Solution
Don’t worry 😁 the protective foam behind the fabric deforms elastically, but is very slow in reaction time. This means that if you dent or shape the foam a bit, it takes a long time to return to its original shape. Leave the SOWA for a couple of hours (or even a couple days if the dent is substantial), and the dent will disappear by itself.