Inspect the gap tape door seal and make sure that: the door can shut fully, the gap tape is the correct width, and that the tape is in the correct area.

If there are any sufficiently large or irregular gaps, consider using a thicker width of door gap tape in those specific sections or applying a second layer of door gap tape if the dimensions allow.

Note the difference between the "natural" door gap and the section of the door with door gap tape temporarily installed. (circled in red)