Shield Shock combo behaviour

When I take the Leap Attack tripod Low Shock to change it to a combo mode and hold the button down I jump twice in succession and the skill goes on cooldown. This mirrors my experience on Martial Artist classes which use combos as well.

When I take 2nd Turbulence on Shield Shock and hold the button down I attack once and the ability is lit up for the 2nd attack. I need to manually press the button again for some reason to activate the 2nd attack in the combo and get the skill to go on cooldown. Why is shield shock not operating like other combos when choosing the 2nd turbulence tripod?

month necro; but if you didnt get an answer (or if anyone else stumbles upon this thread)

shield shock with 2nd turbulence turns it into a ‘chain’ skill; its not well communicated (probably bad translation) but this has a couple of quirks (and is a good thing)

  1. you dont need to use both charges immediately back to back; you can shield shock>taunt>shield shock

  2. each activation procs stuff; so if you have a rage/quick charge rune then it has a chance to proc from either hit; same goes for adrenaline engraving which gets a charge from each hit

theres a striker skill that functions similarly (not sure if its one shared with wardancer)