The Stun reflection node states-
"The Shield will go into cooldown for 8 seconds if the defender is inflicted with either Poison or Incinerate"
I fought this node earlier with HT and it was confusing.
The Shield went into cooldown when I attack with HT. Incinerate was on the defender and the shield was down. After 8 seconds the shield went into cooldown again because he still had a incinerate ( I wasn't attacking him at this moment) however next time the shield came back on until I put a new incinerate even though he already had 3 on him.
I think it needs to say "inflicted with a NEW poison or incinerate" if thats the way its supposed to be because reading it as it is, it looks like so long as he has an incinerate debuff the shield is down for 8 seconds on a cycle until the debuff isn't on him.