diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96c4d0e53..f8295a072 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 1. [](#bugfix)
     * Fixed issue with search plugins not being able to switch between page translations
     * Fixed issues with `Pages::baseRoute()` not picking up active language reliably
+    * Reverted `validation: strict` fix as it breaks sites, see [#1273](https://github.com/getgrav/grav/issues/1273)
 
 # v1.6.21
 ## 02/11/2020
diff --git a/system/src/Grav/Common/Data/BlueprintSchema.php b/system/src/Grav/Common/Data/BlueprintSchema.php
index fe24c4384..c79b3fd11 100644
--- a/system/src/Grav/Common/Data/BlueprintSchema.php
+++ b/system/src/Grav/Common/Data/BlueprintSchema.php
@@ -53,7 +53,7 @@ class BlueprintSchema extends BlueprintSchemaBase implements ExportInterface
     public function validate(array $data)
     {
         try {
-            $messages = $this->validateArray($data, $this->nested, $this->items['']['form'] ?? []);
+            $messages = $this->validateArray($data, $this->nested);
 
         } catch (\RuntimeException $e) {
             throw (new ValidationException($e->getMessage(), $e->getCode(), $e))->setMessages();
@@ -129,11 +129,10 @@ class BlueprintSchema extends BlueprintSchemaBase implements ExportInterface
     /**
      * @param array $data
      * @param array $rules
-     * @param array $parent
      * @return array
      * @throws \RuntimeException
      */
-    protected function validateArray(array $data, array $rules, array $parent)
+    protected function validateArray(array $data, array $rules)
     {
         $messages = $this->checkRequired($data, $rules);
 
@@ -151,8 +150,8 @@ class BlueprintSchema extends BlueprintSchemaBase implements ExportInterface
                 $messages += Validation::validate($child, $rule);
             } elseif (\is_array($child) && \is_array($val)) {
                 // Array has been defined in blueprints.
-                $messages += $this->validateArray($child, $val, $rule ?? []);
-            } elseif (isset($parent['validation']) && $parent['validation'] === 'strict') {
+                $messages += $this->validateArray($child, $val);
+            } elseif (isset($rules['validation']) && $rules['validation'] === 'strict') {
                 // Undefined/extra item.
                 throw new \RuntimeException(sprintf('%s is not defined in blueprints', $key));
             }
diff --git a/tests/unit/Grav/Common/Data/BlueprintTest.php b/tests/unit/Grav/Common/Data/BlueprintTest.php
deleted file mode 100644
index b27b0a961..000000000
--- a/tests/unit/Grav/Common/Data/BlueprintTest.php
+++ /dev/null
@@ -1,54 +0,0 @@
-<?php
-
-use Grav\Common\Data\Blueprint;
-
-/**
- * Class InstallCommandTest
- */
-class BlueprintTest extends \Codeception\TestCase\Test
-{
-    /**
-     */
-    public function testValidateStrict()
-    {
-        $blueprint = $this->loadBlueprint('strict');
-
-        $blueprint->validate(['test' => 'string']);
-    }
-
-    /**
-     * @depends testValidateStrict
-     * @expectedException Grav\Common\Data\ValidationException
-     */
-    public function testValidateStrictRequired()
-    {
-        $blueprint = $this->loadBlueprint('strict');
-
-        $blueprint->validate([]);
-    }
-
-    /**
-     * @depends testValidateStrict
-     * @expectedException Grav\Common\Data\ValidationException
-     */
-    public function testValidateStrictExtra()
-    {
-        $blueprint = $this->loadBlueprint('strict');
-
-        $blueprint->validate(['test' => 'string', 'wrong' => 'field']);
-        die();
-    }
-
-    /**
-     * @param string $filename
-     * @return Blueprint
-     */
-    protected function loadBlueprint($filename)
-    {
-        $blueprint = new Blueprint('strict');
-        $blueprint->setContext(dirname(__DIR__, 3). '/data/blueprints');
-        $blueprint->load()->init();
-
-        return $blueprint;
-    }
-}
diff --git a/tests/unit/data/blueprints/strict.yaml b/tests/unit/data/blueprints/strict.yaml
deleted file mode 100644
index 6121753af..000000000
--- a/tests/unit/data/blueprints/strict.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-form:
-  validation: strict
-
-  fields:
-    test:
-      type: text
-      label: Test
-      validate:
-        required: true