Favorite button always active

Hello,
In my case, the plugin worked well for a while, but hours later it no longer works. The favorites button is always activated when the page loads with the “save” class and I can’t find out what caused this problem.
The only way i’ve found to solve the problem is to remove the line 62 in list.js :

$('.'+ CCC.favorite.toggle_btn).addClass(CCC.favorite.save_classname);

Is this line really useful ??
Thank you for your plugin !