Middleware is not working in Next js v15.4.0

import { NextRequest, NextResponse } from "next/server";
import { getSessionCookie } from "better-auth/cookies";

export async function middleware(request: NextRequest) {
  const sessionCookie = getSessionCookie(request, {
    cookieName: "session_token",
    cookiePrefix: "auth_token",
    // useSecureCookies:
    //   request.nextUrl.protocol === "https:" ||
    //   process.env.NODE_ENV === "production",
  });

  const { pathname } = request.nextUrl;

  const publicRoutes = [
    "/signup",
    "/login",
    "/forgot-password",
    "/reset-password",
    "/",
  ];

  // If the user is logged in, prevent access to /signup and /login
  if (sessionCookie && publicRoutes.includes(pathname)) {
    return NextResponse.redirect(new URL("/dashboard", request.url));
  }

  // If the user is NOT logged in, protect the /dashboard route
  if (!sessionCookie && pathname.startsWith("/dashboard")) {
    return NextResponse.redirect(new URL("/login", request.url));
  }

  return NextResponse.next();
}

export const config = {
  matcher: [
    "/",
    "/dashboard/:path*",
    "/signup",
    "/login",
    "/forgot-password",
    "/reset-password",
  ],
};