#1 - March 3, 2015, 8:56 p.m.
Blizzard Post
We’ve recently made a slight change to how crowd control diminishing returns function, and would like to provide some concrete information on exactly what’s been changed and why.

As most of you are likely aware, there is a brief window of time after a crowd control effect has been applied, during which further crowd control effects of the same category will have a decreased duration. In patch 6.0.3, due to the method used to update diminishing returns, that window could last anywhere from 15 to 20 seconds.

Patch 6.1 added some new functionality that allows diminishing returns to update much faster, which means we can be a lot more precise with exactly how long they last. So, we made a recent hotfix that changes the duration of diminishing returns to 18 seconds. That means diminishing returns should last about as long as they did on average prior to these changes, but you’re able to have a much clearer idea of exactly when they’ll end.