The draft excluder finally popped out and another one, which is more qualitative, was purchased.
Its problems are two:
1. It has fabric that covers the foam cylinder, but without being glued to it. So, if it is forced to go under the door, the fabric does not fully follow, resulting in one end of the foam cylinder remaining bare of fabric.
2. The cylinder does not have the same thickness throughout its length, and ultimately when the draft excluder is installed, it looks ugly and uneven.