Platform: Windows
ISP: TXOX
Type of Internet Connection: CATV
Internet Connection Speed: 15Mbps
Date & Time: Nov 7, 2018 9:48PM MST
Frequency: Reproducible
Character Name: Flickk
Race: TaruM
World: Odin
Main Job: Bard, Lv.99 (Master)
Support Job: White Mage
Area and Coordinates: Any Zone (Tested in Mhuara and Qufim Island)
Party or Solo: Solo
NPC Name: None
Monster Name: None
Steps:

Equiped "Bihu Justaucorps +3" (Bard Relic Body), with 5/5 Troubadour Merits in effect, and used the job ability "Troubadour". Duration remains at 1:00 instead of being extended to 1:20 under these conditions. Had another player test under the same conditions except with "Bihu Justaucorps" instead. The result was an increased duration of the job ability to 1:20, as expected. The "+3" version of the relic body appears to have a bug and does not affect the job ability duration as intended.