Falcon door trim on 2017 P100D

[uxixu]

Looking at a used 2017 P100D... saw this on the falcon door. Is it a poor man's trim? Anyone know what's going on here? Thinking spray on temp trim or maybe sound deadening? Doesn't appear on the other side.

 

[buckets0fun]

Common issue, only way to fix is to replace the whole glass panel as the seal/weatherstripping is part of it.