Lee Rowlands
--- a/core/modules/layout_builder/tests/src/Kernel/InlineBlockSerializationTest.php 0 → 100644
+++ b/core/modules/layout_builder/tests/src/Kernel/InlineBlockSerializationTest.php 0 → 100644
+      'status' => TRUE,
+    ])->save();
+    LayoutBuilderEntityViewDisplay::load('node.article.default')
+      ->enableLayoutBuilder()
+      ->setOverridable()
+      ->save();
+  }
+
+  /**
+   * Tests saving layout with inline block, which has serialized data.
+   *
+   * @covers ::getUnserializedBlock
+   */
+  public function testCreationBlockWithSerializedData(): void {
+    // Create inline block with serialized data not representing block entity.
+    $component = new SectionComponent('17901944-a4b6-11ee-a506-0242ac120002', 'content', [
--- a/core/modules/layout_builder/src/Plugin/Block/InlineBlock.php
+++ b/core/modules/layout_builder/src/Plugin/Block/InlineBlock.php
    return $this->entityTypeManager->getViewBuilder($block->getEntityTypeId())->view($block, $this->configuration['view_mode']);
  }

+  /**
+   * Processes serialized block correctly.