Requiring users to be authenticated for specific routes in laravel

Question

I'm having some issues with protecting routes in Laraval.

So one of my routes: Route::get('/purchase-quote', ['middleware' => 'auth', 'uses' => 'PurchaseController@purchaseQuote']);

Lets say for example, I am on page /about and I click a link that takes me to /purchase-quote. Well it's doing what I want there, it's forcing someone to login or register before accessing the page.

The issue is that after they register, instead of continuing on and taking them to the intended /purchase-quote page, it takes them directly to the home page at /

This used to work the way I am needing it to, and all of a sudden it does not. If I do login instead of register, it works the way it should.

Will also include auth code here:

public function handle($request, Closure $next, $guard = null)
    {
        if (Auth::guard($guard)->guest()) {
            if ($request->ajax() || $request->wantsJson()) {
                return response('Unauthorized.', 401);
            } else {
                return redirect()->guest('register');
            }
        }
        return $next($request);
    }