I don't know if it's just these facewear glasses, but they normally don't reflect very much. But for some reason in this cutscene they reflect so much you can barely see through them.
Here's what it looks like In the Vault vs not in the Vault:
https://imgur.com/a/Peitb33


Date of issue:4/24/2025
Frequency:Always
Class/Level: BLM 60
Party or solo: SOLO
Area and coordinates: The Vault cutscenes
Steps:
1. Have Slim Frame Glasses equipped in facewear slot

Platform: Windows/Steam

PC Specs
-=-=-=-=- System Information -=-=-=-=-
Processor 13th Gen Intel(R) Core(TM) i7-13700KF 3.40 GHz
Installed RAM 32.0 GB (31.8 GB usable)
System type 64-bit operating system, x64-based processor

NVIDIA GeForce RTX 3070 Ti
Driver Version 32.0.15.7602