devtrackers.gg
If you're talking about the old 3x shock stacking it was revealed at exilecon that shocks never actually stacked past 1 due to a bug in code. I think I remember that comment correctly
Not quite. The original implementation of shock was 20% increased damage taken, and stacked up to 5 times. It was in the game for something like I think 8 months or so before I found the bug, which wasn't that it didn't stack, but that it didn't actually do anything (or more correctly, it did grant the correct stat, but the increased damage taken stat didn't do anything and shock was the only source of that modifier at the time). In the intervening time, several players had complained that shock was OP and needed a nerf.
I think he was referencing this post from chris: https://www.reddit.com/r/pathofexile/comments/2d6xiv/eternal_and_diamond_supporter_newsletter_76/cjmr9ke/
Ah, I don't remember that one. That would have been a later bug then. I always the remember the "shock did nothing for several months" bug, probably because that was entirely my fault :P