I have no Idea. I've seen characters take at least 1 turn, if not 2 while having bombs on them. Clearly JE was able to take 7 turns from the image, so it has nothing to do with his turn. I really would like remote detonator. It'd be unique and fun. Here's my JE concept:
Jawa engineer
Miniaturized Detonator
STICKY BOMBS (basic): Throw a sticky bomb on target enemy. This attack can be dodged, but not resisted. Bombs detonate when triggered or when Jawa Engineer dies. (NO COOLDOWN ON THIS)
DETONATOR (basic): Deal low damage to target enemy. If that enemy has any sticky bombs, they all detonate doing lots of damage (Think 1000-2500 per bomb based on level skill). (NO COOLDOWN ON THIS)
PATCH UP: NO CHANGE
RECALIBRATE (special): NO CHANGE
CRUNCH TIME (leader): Jawa Engineer has +9 speed for each Jawa or Droid Ally. Droid and Jawa allies gain half this speed and gain 20% increased protection.