I have noticed that already month ago on another character but now that I hit 25 on Recursion I thought I'd pay Tengu a little visit, where I encountered that bug again.
Situation:
Load = Sniper (conceal, Concealed Shot, Line Up the Shot) + Pistols (Pistol Aerial, Pistol Slide)
Action: () ... Optional Action
(Firearms skill + )Conceal + Line Up the Shot + Conceal Shot + Power Chastity attacks
Outcome: Dramatically decreased damage output instead of dramatically increased one.
Normal damage with (full) combo: 200-250 with Concealed shot and 70+ damage with power Chastity
Bugged damage with (full) combo: 30-70 with Concealed shot and 8-25 damage with power Chastity
Normal damage with power Chastity: 25-40 damage
The bugged damage returns to normal after Line up the Shot is gone.
Evidence in photo (full combo):

I should have reported this month ago, really -_-
Situation:
Load = Sniper (conceal, Concealed Shot, Line Up the Shot) + Pistols (Pistol Aerial, Pistol Slide)
Action: () ... Optional Action
(Firearms skill + )Conceal + Line Up the Shot + Conceal Shot + Power Chastity attacks
Outcome: Dramatically decreased damage output instead of dramatically increased one.
Normal damage with (full) combo: 200-250 with Concealed shot and 70+ damage with power Chastity
Bugged damage with (full) combo: 30-70 with Concealed shot and 8-25 damage with power Chastity
Normal damage with power Chastity: 25-40 damage
The bugged damage returns to normal after Line up the Shot is gone.
Evidence in photo (full combo):

I should have reported this month ago, really -_-


