Hair Nodes behavior with Blur attribute Node

I was messing around with the new hair nodes, and I tried to paint an attribute to drive density/curve radius but when I try to blur the attribute to get a smooth trasition the hair nodes just stop working.

here the attribute I painted working fine

If I blur it one time, it's gone but when I check the attribute it is blurring, maybe is a bug or something? I tried in 3.5 and 3.6 (from steam)