diff --git a/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php b/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
index 2a55d93a6066f..747c70dfb4fa0 100644
--- a/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
@@ -61,7 +61,10 @@ public function supportsDecoding($format, array $context = []): bool
      */
     private function getDecoder(string $format, array $context): DecoderInterface
     {
-        if (isset($this->decoderByFormat[$format])
+        $hasContext = 0 < \count($context);
+        if (
+            !$hasContext
+            && isset($this->decoderByFormat[$format])
             && isset($this->decoders[$this->decoderByFormat[$format]])
         ) {
             return $this->decoders[$this->decoderByFormat[$format]];
@@ -69,7 +72,10 @@ private function getDecoder(string $format, array $context): DecoderInterface
 
         foreach ($this->decoders as $i => $decoder) {
             if ($decoder->supportsDecoding($format, $context)) {
-                $this->decoderByFormat[$format] = $i;
+                if (!$hasContext) {
+                    // cache decoder if no dynamic context is given
+                    $this->decoderByFormat[$format] = $i;
+                }
 
                 return $decoder;
             }
diff --git a/src/Symfony/Component/Serializer/Encoder/ChainEncoder.php b/src/Symfony/Component/Serializer/Encoder/ChainEncoder.php
index b13333e88aabb..23c159ce65777 100644
--- a/src/Symfony/Component/Serializer/Encoder/ChainEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/ChainEncoder.php
@@ -79,7 +79,10 @@ public function needsNormalization(string $format, array $context = []): bool
      */
     private function getEncoder(string $format, array $context): EncoderInterface
     {
-        if (isset($this->encoderByFormat[$format])
+        $hasContext = 0 < \count($context);
+        if (
+            !$hasContext
+            && isset($this->encoderByFormat[$format])
             && isset($this->encoders[$this->encoderByFormat[$format]])
         ) {
             return $this->encoders[$this->encoderByFormat[$format]];
@@ -87,7 +90,10 @@ private function getEncoder(string $format, array $context): EncoderInterface
 
         foreach ($this->encoders as $i => $encoder) {
             if ($encoder->supportsEncoding($format, $context)) {
-                $this->encoderByFormat[$format] = $i;
+                if (!$hasContext) {
+                    // cache encoder if no dynamic context is given
+                    $this->encoderByFormat[$format] = $i;
+                }
 
                 return $encoder;
             }
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
index 5cac8d99a5270..847526990ebb3 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
@@ -36,6 +36,7 @@ protected function setUp(): void
                 [self::FORMAT_2, [], false],
                 [self::FORMAT_3, [], false],
                 [self::FORMAT_3, ['foo' => 'bar'], true],
+                [self::FORMAT_3, ['foo' => 'bar2'], false],
             ]);
 
         $this->decoder2 = $this->createMock(DecoderInterface::class);
@@ -45,6 +46,8 @@ protected function setUp(): void
                 [self::FORMAT_1, [], false],
                 [self::FORMAT_2, [], true],
                 [self::FORMAT_3, [], false],
+                [self::FORMAT_3, ['foo' => 'bar'], false],
+                [self::FORMAT_3, ['foo' => 'bar2'], true],
             ]);
 
         $this->chainDecoder = new ChainDecoder([$this->decoder1, $this->decoder2]);
@@ -52,10 +55,26 @@ protected function setUp(): void
 
     public function testSupportsDecoding()
     {
+        $this->decoder1
+            ->method('decode')
+            ->willReturn('result1');
+        $this->decoder2
+            ->method('decode')
+            ->willReturn('result2');
+
         $this->assertTrue($this->chainDecoder->supportsDecoding(self::FORMAT_1));
+        $this->assertEquals('result1', $this->chainDecoder->decode('', self::FORMAT_1, []));
+
         $this->assertTrue($this->chainDecoder->supportsDecoding(self::FORMAT_2));
+        $this->assertEquals('result2', $this->chainDecoder->decode('', self::FORMAT_2, []));
+
         $this->assertFalse($this->chainDecoder->supportsDecoding(self::FORMAT_3));
+
         $this->assertTrue($this->chainDecoder->supportsDecoding(self::FORMAT_3, ['foo' => 'bar']));
+        $this->assertEquals('result1', $this->chainDecoder->decode('', self::FORMAT_3, ['foo' => 'bar']));
+
+        $this->assertTrue($this->chainDecoder->supportsDecoding(self::FORMAT_3, ['foo' => 'bar2']));
+        $this->assertEquals('result2', $this->chainDecoder->decode('', self::FORMAT_3, ['foo' => 'bar2']));
     }
 
     public function testDecode()
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
index e80dc4f1843a6..612397b54d9be 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
@@ -37,6 +37,7 @@ protected function setUp(): void
                 [self::FORMAT_2, [], false],
                 [self::FORMAT_3, [], false],
                 [self::FORMAT_3, ['foo' => 'bar'], true],
+                [self::FORMAT_3, ['foo' => 'bar2'], false],
             ]);
 
         $this->encoder2 = $this->createMock(EncoderInterface::class);
@@ -46,6 +47,8 @@ protected function setUp(): void
                 [self::FORMAT_1, [], false],
                 [self::FORMAT_2, [], true],
                 [self::FORMAT_3, [], false],
+                [self::FORMAT_3, ['foo' => 'bar'], false],
+                [self::FORMAT_3, ['foo' => 'bar2'], true],
             ]);
 
         $this->chainEncoder = new ChainEncoder([$this->encoder1, $this->encoder2]);
@@ -53,10 +56,26 @@ protected function setUp(): void
 
     public function testSupportsEncoding()
     {
+        $this->encoder1
+            ->method('encode')
+            ->willReturn('result1');
+        $this->encoder2
+            ->method('encode')
+            ->willReturn('result2');
+
         $this->assertTrue($this->chainEncoder->supportsEncoding(self::FORMAT_1));
+        $this->assertEquals('result1', $this->chainEncoder->encode('', self::FORMAT_1, []));
+
         $this->assertTrue($this->chainEncoder->supportsEncoding(self::FORMAT_2));
+        $this->assertEquals('result2', $this->chainEncoder->encode('', self::FORMAT_2, []));
+
         $this->assertFalse($this->chainEncoder->supportsEncoding(self::FORMAT_3));
+
         $this->assertTrue($this->chainEncoder->supportsEncoding(self::FORMAT_3, ['foo' => 'bar']));
+        $this->assertEquals('result1', $this->chainEncoder->encode('', self::FORMAT_3, ['foo' => 'bar']));
+
+        $this->assertTrue($this->chainEncoder->supportsEncoding(self::FORMAT_3, ['foo' => 'bar2']));
+        $this->assertEquals('result2', $this->chainEncoder->encode('', self::FORMAT_3, ['foo' => 'bar2']));
     }
 
     public function testEncode()