Does Bow Master "Vengance" Skill work right?

I maxed Vengance in my new skill build, but thinking of getting the hot time scroll reset on my BM today and removing it.

The description says that it works 50% of the time, but I can stand on monsters and take hit after hit after hit without it working. It feels more like its working 5% of the time. Also, when I look at the skill tables here on SP, it says the stun duration or whatever is 6 seconds. In game it still says "0" even though I have it maxed.

I think the skill would be useful if it did what it says it supposed to do, but for now I'm wondering if its glitched into staying on lvl 1 or something.

Well, if works fine for me..

Depending on ur lvl, u can reset it and then add it later.. cuz u wont need Hamstring anyways

does it activate 50% of the time? And what does your description say?

I think the 50% is a visual error.