63 vibroverb
Tele-Afflicted
If the frets are leveled and it’s still occurring, I would take a look at the neck pocket. Even a slight incline could cause the neck angle to be off and have strings buzz. One non-intrusive way to remedy that is to get a maple neck pocket shim from stew mac and raise the tuner side of the neck (half a degree should be enough). You could get a luthier to alter the incline/decline of the pocket later, if this is indeed the issue.