There is a problem in jet blue a321 livery
Okay, that’s an extremely minor issue, so I doubt the devs will take the time to fix it. Maybe they will in a future A321 rework (which we just got last update).
Just a texture error. No need to worry that will be fixed soon
Also bare in mind there is about 700+ liverys, so some are going to have extremely minor issues.
Thanks for the report.