Great plugin but a huge problem with Leverage browser caching

This plugin works very great and Thank you!

Before we use your plugin, gtmatrix score is very good.
https://prntscr.com/cymjya
Of course, we added caching code ( compression, headers.. etc..) https://prntscr.com/cymkhw

After we activate yours, it’s not able to get any caching and leverage browser caching is “0”.
https://prntscr.com/cymlrz
https://prntscr.com/cymmkt
As you see cache control is public.

Did we miss something to setup?
This is our setup and using multisite. https://prntscr.com/cymmr9

Please advice us if will be big help.
Thank you again