Laravel-Mix building app.css with old resource file

hey there,

I have a strange behavior of Laravel-Mix. If I change or add some style in my /resources/css/app.css and do 'npm run dev' it is building the /public/css/app.css, but my last changes are not included:

@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
@import '@fortawesome/fontawesome-free/css/all.css';
@import 'tailwindcss/base';
@import 'tailwindcss/components';
@import 'tailwindcss/utilities';
@import 'lightbox2/dist/css/lightbox.css';
@import 'typeahead/style.css';

@layer components {
    .card {
        @apply bg-gray-100 rounded-3xl overflow-hidden shadow-md flex flex-col;
    }

    .card-ape {
        @apply bg-green-50 rounded-3xl border-4 border-green-200 overflow-hidden shadow-md flex flex-col;
    }
    .badge-img {
        @apply bg-gray-100 bg-opacity-90 text-xs uppercase font-bold rounded-full p-2 absolute bottom-1 right-1;
    }
    .badge-vid {
        @apply bg-gray-100 bg-opacity-90 text-xs uppercase font-bold rounded-full p-2 absolute bottom-1 left-1;
    }

    /* Neues Layout */
    .vote-btn {
        @apply p-1 rounded-2xl border shadow-md text-center
    }

    .vote-pro {
        @apply border-green-600 hover:bg-green-200 text-green-600
    }

    .vote-pro.active {
        @apply bg-green-200
    }

    .vote-contra {
        @apply border-red-600 hover:bg-red-200 text-red-600
    }
    .vote-contra.active {
        @apply bg-red-200
    }

    .filter-list .active {
        @apply border rounded-full px-2 py-1 border-green-600 bg-green-600 text-white font-semibold
    }

    .filter-list a:hover {
        @apply underline
    }

    .my-button {
        @apply border-2 p-2 rounded-2xl
    }
}

the last class '.my-botton' is newly added. But does not appear in public/css/app.css. But if I remove everything in layer-components it is removing all this things from generated app.css file. If I then just add the my-button, it does not appear in generated output file.

Can someone explain what is happening?

I am working on win10 with php8.2 and

D:\>npm -v
9.5.1

D:\>npx -v
9.5.1

D:\>node -v
v18.16.0

All morning everything worked fine. Maybe some kind of Cache in node is running full?