Guild Wars 2

When you reflect a projectile while in stealth, you get Revealed. Reflecting should count as enemies dealing damage to themselves, not originating from the character reflecting.

It’s not a bug; it’s (apparently) intended design.

It could be interpreted either way:

• without your reflect skill, the enemies wouldn’t take damage → you cause the damage
• if they don’t attack, they don’t take damage → they cause the damage

However, stealth breaking exists as a game balancing mechanic, not a judgment call based on parsing the description. Accordingly, if you don’t want to break stealth prematurely, don’t put up any reflects.