redirect back in wrong route in laravel 6

i use Laravel 6 for my project and for some of controllers i have to redirect back so when i use

 return redirect()->back();

in my project ,getting trouble and project redirect to

projectUrl/backRoute/favicon.png

automatically paste favicon.png to the end of the address also i use

php artisan route:clear

and check all route there is not any error in route i think something in framework change! how can i fix it?

Answer

problem was found in icon link

    <link rel="icon" type="image/png" href="{{ asset('logoFile.png') }}">

type was not same exactly with icon extension and because of that project sometimes goings wrong