| 1 | diff --git a/src/wp-admin/edit-form-blocks.php b/src/wp-admin/edit-form-blocks.php |
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| 2 | index 4e104feda2..c1c37487ef 100644 |
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| 3 | --- a/src/wp-admin/edit-form-blocks.php |
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| 4 | +++ b/src/wp-admin/edit-form-blocks.php |
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| 5 | @@ -69,7 +69,7 @@ $preload_paths = apply_filters( 'block_editor_preload_paths', $preload_paths, $p |
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| 6 | * Because API preloading can call the_content and other filters, plugins |
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| 7 | * can unexpectedly modify $post. |
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| 8 | */ |
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| 9 | -$backup_global_post = $post; |
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| 10 | +$backup_global_post = clone $post; |
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| 11 | |
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| 12 | $preload_data = array_reduce( |
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| 13 | $preload_paths, |
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