Ajax +1's Enhancing Magic Received Duration Augment Does Not Affect Reprisal

Platform: Windows 7
ISP: Comcast
Type of Internet Connection: CATV
Internet Connection Speed: 150Mbps
Date & Time: August 17, 2020 9:28PM CDT
Frequency: Every time
Character Name: Arikardos
Race: Hume Male
World: Asura
Main Job: Paladin LVL99
Support Job: Blue Mage LVL49
Area and Coordinates: Upper Jeuno (I-11)
Party or Solo: Solo
NPC Name: N/A
Monster Name: N/A
Steps:
1. Change Job to Paladin LVL99
2. Equip the shield Ajax +1 Rank 15 (Enhancing Magic Received Duration +10%)
3. Cast the spell, "Reprisal"
4. Ajax +1 Rank 15 does not increase the duration of Reprisal