It was implemented based on our proposal. It was intended to only work with Slam. That said, I’m not opposed to the idea that it works vs all Chilled and Slowed enemies considering how much our other builds need buffs. But there aren’t that many builds that would benefit from it.
R6 HOTA? Sure.
IK HOTA? It would have to replace EF in the off-hand, but sure.
It’s not going to benefit WW much because, nor Vile Charge which can’t fit it into the build, nor Fire or Physical EQ.
LOD HOTA? Again, you’d have to dump EF.
So, a bug, yes, but not necessarily a bad one. Would report, and if it doesn’t get fixed, cool.