diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7361eefba..9cc02a092 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@
     * Fixed ordering being lost when saving modular `Flex Page`
     * Fixed `validation: strict` not working in blueprints (see `system.strict_mode.blueprint_compat` setting) [#1273](https://github.com/getgrav/grav/issues/1273)
     * Fixed `Blueprint::extend()` and `Blueprint::embed()` not initializing dynamic properties
+    * Regression: Fixed unchecking toggleable having no effect in Flex forms
 
 # v1.7.0-rc.6
 ## 02/11/2020
diff --git a/system/src/Grav/Common/Data/BlueprintSchema.php b/system/src/Grav/Common/Data/BlueprintSchema.php
index b37bbdb1a..de7fb8897 100644
--- a/system/src/Grav/Common/Data/BlueprintSchema.php
+++ b/system/src/Grav/Common/Data/BlueprintSchema.php
@@ -183,26 +183,7 @@ class BlueprintSchema extends BlueprintSchemaBase implements ExportInterface
     {
         $results = [];
 
-        if ($missingValuesAsNull) {
-            // First pass is to fill up all the fields with null.
-            foreach ($rules as $key => $val) {
-                if ($key && $key !== '*') {
-                    $rule = $this->items[$parent . $key] ?? null;
-
-                    if (!$rule || !empty($rule['disabled']) || !empty($rule['validate']['ignore'])) {
-                        continue;
-                    }
-
-                    $results[$key] = null;
-                }
-            }
-        }
-
         foreach ($data as $key => $field) {
-            if (null === $field && !$missingValuesAsNull) {
-                continue;
-            }
-
             $val = $rules[$key] ?? $rules['*'] ?? null;
             $rule = \is_string($val) ? $this->items[$val] : $this->items[$parent . $key] ?? null;
 
@@ -212,6 +193,15 @@ class BlueprintSchema extends BlueprintSchemaBase implements ExportInterface
                 continue;
             }
 
+            if (null === $field) {
+                if ($missingValuesAsNull) {
+                    $results[$key] = null;
+                } else {
+                    unset($results[$key]);
+                }
+                continue;
+            }
+
             if ($rule && $rule['type'] !== '_parent') {
                 $field = Validation::filter($field, $rule);
             } elseif (\is_array($field) && \is_array($val)) {
diff --git a/system/src/Grav/Framework/Flex/FlexObject.php b/system/src/Grav/Framework/Flex/FlexObject.php
index 989bddfe0..39469c929 100644
--- a/system/src/Grav/Framework/Flex/FlexObject.php
+++ b/system/src/Grav/Framework/Flex/FlexObject.php
@@ -120,7 +120,7 @@ class FlexObject implements FlexObjectInterface, FlexAuthorizeInterface
 
             $blueprint->validate($elements);
 
-            $elements = $blueprint->filter($elements);
+            $elements = $blueprint->filter($elements, true, true);
         }
 
         $this->filterElements($elements);
@@ -547,7 +547,7 @@ class FlexObject implements FlexObjectInterface, FlexAuthorizeInterface
 
             // Validate and filter elements and throw an error if any issues were found.
             $blueprint->validate($test + ['storage_key' => $this->getStorageKey(), 'timestamp' => $this->getTimestamp()]);
-            $data = $blueprint->filter($data, false, true);
+            $data = $blueprint->filter($data, true, true);
 
             // Finally update the object.
             foreach ($blueprint->flattenData($data) as $key => $value) {