[V3] Return null on IntSynth when null is passed in

src/Mechanisms/HandleComponents/Synthesizers/IntSynth.php

@@ -15,7 +15,7 @@ static function matchByType($type) {
     }
 
     static function hydrateFromType($type, $value) {
-        if ($value === '') return null;
+        if ($value === '' || $value === null) return null;
 
         return (int) $value;
     }

src/Mechanisms/HandleComponents/Synthesizers/Tests/IntSynthUnitTest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Livewire\Mechanisms\HandleComponents\Synthesizers\Tests;
+
+use Livewire\Component;
+use Livewire\Livewire;
+
+class IntSynthUnitTest extends \Tests\TestCase
+{
+    /**
+     * @test
+     */
+    public function null_value_hydrated_returns_null()
+    {
+        Livewire::test(ComponentWithNullableInt::class)
+            ->set('intField', null)
+            ->assertSet('intField', null, true); // Use strict mode
+    }
+}
+
+class ComponentWithNullableInt extends Component
+{
+    public ?int $intField = null;
+
+
+    public function render()
+    {
+        return view('null-view');
+    }
+}