diff --git a/src/Integrations/Divi/Compose/LoopScope.php b/src/Integrations/Divi/Compose/LoopScope.php
index e36516a..394ea57 100644
--- a/src/Integrations/Divi/Compose/LoopScope.php
+++ b/src/Integrations/Divi/Compose/LoopScope.php
@@ -94,6 +94,18 @@ final class LoopScope
         return $this->queryType === null ? [] : [$this->kind(), ...$this->outerKinds];
     }
 
+    /**
+     * Identity of the context: the loop and the kinds of its whole chain (audit M1). Two scopes with the same key
+     * resolve every loop_* reference the same way; no loop is "-|".
+     */
+    public function key(): string
+    {
+        return ($this->queryType ?? '-') . '|' . implode(',', array_map(
+            static fn (?string $kind): string => $kind ?? '?',
+            $this->kinds()
+        ));
+    }
+
     /** Whether there is a loop whose loop_* options the tools allow. */
     public function active(): bool
     {
diff --git a/src/Integrations/Divi/Pages/DiviUpdateAbility.php b/src/Integrations/Divi/Pages/DiviUpdateAbility.php
index 0790622..207518d 100644
--- a/src/Integrations/Divi/Pages/DiviUpdateAbility.php
+++ b/src/Integrations/Divi/Pages/DiviUpdateAbility.php
@@ -231,7 +231,7 @@ final class DiviUpdateAbility extends DiviWriteAbility
      */
     private static function composeInLoops(NodeIndex $index, DiviComposition $composition, array $pending): array
     {
-        /** @var array<string, Composer> $composers query type ('' = no loop) => Composer of that scope */
+        /** @var array<string, Composer> $composers LoopScope::key() => Composer of that scope */
         $composers = [];
         $scopes = [];
         $results = [];
@@ -247,7 +247,7 @@ final class DiviUpdateAbility extends DiviWriteAbility
         }
         foreach ($pending as $position => [$block, $change, $field]) {
             $scope = self::loopAt($index, $block, $newAttrs);
-            if ($scope->queryType() !== $scopes[$position]->queryType()) {
+            if ($scope->key() !== $scopes[$position]->key()) {
                 $results[$position] = self::composerFor($composition, $scope, $composers)
                     ->update($block, $change, $field);
             }
@@ -256,9 +256,9 @@ final class DiviUpdateAbility extends DiviWriteAbility
         return $results;
     }
 
-    /** @param array<string, Composer> $composers One Composer per loop scope (S31 as reworded by X3). */
+    /** @param array<string, Composer> $composers One Composer per loop context, chain included (S31 as reworded by X3). */
     private static function composerFor(DiviComposition $composition, LoopScope $scope, array &$composers): Composer
     {
-        return $composers[$scope->queryType() ?? ''] ??= $composition->inLoop($scope)->composer();
+        return $composers[$scope->key()] ??= $composition->inLoop($scope)->composer();
     }
 }
diff --git a/tests/Unit/Integrations/Divi/Pages/DiviLoopWriteTest.php b/tests/Unit/Integrations/Divi/Pages/DiviLoopWriteTest.php
index ef1b2d8..276124e 100644
--- a/tests/Unit/Integrations/Divi/Pages/DiviLoopWriteTest.php
+++ b/tests/Unit/Integrations/Divi/Pages/DiviLoopWriteTest.php
@@ -47,6 +47,9 @@ final class DiviLoopWriteTest extends DiviWriteAbilityTestCase
                 'date_format' => $field('select'), 'custom_date_format' => $field('text'),
             ]),
             'loop_term_name' => $option('loop_term_name', 'Loop Terms', $common),
+            'loop_post_meta_key_manual_custom_field' => $option('loop_post_meta_key_manual_custom_field', 'Loop', $common + [
+                'select_loop_meta_key' => $field('select'), 'loop_meta_key' => $field('text'),
+            ]),
         ];
     }
 
@@ -530,4 +533,55 @@ final class DiviLoopWriteTest extends DiviWriteAbilityTestCase
         self::assertTrue($result['ok'], (string) json_encode($result));
         self::assertStringContainsString('loop_post_meta_key_manual_custom_field', implode(' | ', $result['warnings']));
     }
+
+    /** Two sections: a post loop on its own, and a post loop inside a term loop (s1). */
+    private function useTwoSectionPage(): void
+    {
+        $inner = static fn (): string => self::block('text', self::loop(self::POST_LOOP));
+        $this->usePage('<!-- wp:divi/placeholder -->'
+            . self::block('section', [], self::block('row', [], self::block('column', [], $inner())))
+            . self::block('section', self::loop(self::TERM_LOOP), self::block('row', [], self::block('column', [], $inner())))
+            . '<!-- /wp:divi/placeholder -->');
+    }
+
+    private static function metaChange(string $id): array
+    {
+        $ref = VariableRef::serialize(
+            'content',
+            'loop_post_meta_key_manual_custom_field',
+            ['before' => '', 'after' => '', 'loop_meta_key' => 'telefon']
+        );
+
+        return ['id' => $id, 'attrs' => ['content.innerContent' => ['desktop' => $ref]]];
+    }
+
+    /** Re-review (M1): the composers of one update call are told apart by the whole chain, not the inner kind. */
+    public function testMetaKeyContentIsCheckedAgainstTheWholeChainInOneCall(): void
+    {
+        $this->useTwoSectionPage();
+        $inTerm = $this->changeAll([self::metaChange('s1.r0.c0.m0')]);
+        self::assertStringContainsString('Typ: Beiträge', self::problems($inTerm), 'refused when sent alone');
+
+        $both = $this->changeAll([self::metaChange('s0.r0.c0.m0'), self::metaChange('s1.r0.c0.m0')]);
+        self::assertStringContainsString('changes[1]', implode(' ', array_keys(self::errorFields($both))));
+        self::assertStringContainsString('passt nicht zur Schleife', self::problems($both));
+        self::assertSame([], $this->saved);
+
+        $plain = $this->changeAll([self::metaChange('s0.r0.c0.m0')]);
+        self::assertTrue($plain['ok'], (string) json_encode($plain));
+    }
+
+    /** Re-review (M1): an outer loop switched to another kind in the same call refuses meta key content below. */
+    public function testSwitchingTheOuterLoopRefusesMetaKeyContentOfTheInnerLoop(): void
+    {
+        $this->useTwoSectionPage();
+
+        $refused = $this->changeAll([
+            ['id' => 's0', 'attrs' => ['module.advanced.loop' => ['desktop' => self::TERM_LOOP]]],
+            self::metaChange('s0.r0.c0.m0'),
+        ]);
+
+        self::assertStringContainsString('changes[1]', implode(' ', array_keys(self::errorFields($refused))));
+        self::assertSame([], $this->saved);
+    }
 }