Date & Time: 6/29/2024 - 1:43 PM EST
Steps:
1. Use any item of the set
2. Try any dye (Example 1 is using Metallic Green to make it obvious, but all dyes are affected)
3. Applies even while equipped to the character (Example 2)

The Tank Armor Set is unaffected, it's the third example.
https://imgur.com/a/yFm5RTi


Example 1: Maiming Set In Try On Menu (Metallic Green used for clarity)
Example 2: Maiming Set Equipped to Character (Dalamud Red used, with Nier Maiming Mask as comparison)
Example 3: Fending Set in Try On Menu, functioning as intended (Metallic Green used for clarity)