WP fastest cache make my wp-login.php not working

Hi

I use a theme called rehub (very popular on envato) it uses regular wp-login.php for login to website but whenever wp fastest cache is enable, login module from my theme is no responding (i can’t click on it) or at best it acts like if i was logged out and when i clic to login (where i’m already logged in) nothing happens.
When i clear the cache and refresh the page it works one time, but if page is refreshed again problem starts again.
I’m sure it comes from wp fastest cache as when i disable the plugin, the problem disapears.

I already have wp-login.php in excluded pages so i don’t understand why i’m having troubles.

Any idea how to fiX this ?

Thank you