[6.x] Apply default preferences when logged out (#13363)

Author: jasonvarga

src/Preferences/Preferences.php

@@ -43,14 +43,15 @@ public function preventMergingChildren($dottedKey)
      */
     public function all()
     {
-        if (auth()->guest()) {
-            return [];
+        $this->resetState();
+
+        if (auth()->check()) {
+            $this
+                ->mergeDottedUserPreferences()
+                ->mergeDottedRolePreferences();
         }
 
         return $this
-            ->resetState()
-            ->mergeDottedUserPreferences()
-            ->mergeDottedRolePreferences()
             ->mergeDottedDefaultPreferences()
             ->getMultiDimensionalPreferences();
     }