Smallest Font-size Problem

Hi
Thank You For This Plugin

i use this plugin in my project
i build a webpage and load this on mobile with your plugin
but when i use smallest font-size i webview cant show real size of font on my mobile
i use font-size 3px but webview cant show smaller than 6px
i try with another plugin but this problem is on all of theme
thats my desktop screen shot and this is ok!


and this is my mobile screen shot


i try with chrome browser on mobile and font-size is ok
i try with android studio emulator (your plugin) and font-size is ok
but when i use my mobile for view the webpage font-size is larger than 3px
my mobile model is xiaomi A3

thank you