Captain Rank bug?

Date & Time: 5/6/19 approximately 12 am PST
Frequency: 1 time
World name: balmung
Character name: Iceblink Luck
NPC name: Serpent Squadron Sergeant
Class/Level: SCH 70
Party or solo: solo
Area and coordinates: twin adder barracks
Housing:
Steps:

I finished 5 separate command missions
and ! appeared above the sergeants head
I accepted the flagged mission "Sapper Strike"
I waited for the quest to complete
It successfully completed
I was not given a cutscene
I was not awarded captain rank
The ! was still above his head and the quest was still there
I reluctantly reaccepted the flagged mission "sapper strike" at approx 5/7/19 8pm pst