Answer
Depending on how you’re using your object, the only way I’ve been able to have my blurs stay when resizing is a cheat way.
What I did was save my blurred object as it’s own PDF, then place that PDF within the Illustrator file I’m working in. You can then resize that object to any size and it’ll keep your effects, strokes, etc., that didn’t scale before intact. The downsize is it’s not editable directly unless you open that PDF and edit it separately.
Attribution
Source : Link , Question Author : Bekah , Answer Author : WELZ