I can't change font size in instances of component

My issue is that,

  1. I created a variant component (Default and variant1) with text inside it
  2. I used its instances
  3. Then problem is that when I change the font size of variant1 and then then when I preview it wont work

here is the file please check once https://www.figma.com/file/ZyuutY6Q0xlWAYbcT4RX1R/prob?node-id=0%3A1

Did you solve it? I have the same issue