diff --git a/core/modules/block/config/schema/block.schema.yml b/core/modules/block/config/schema/block.schema.yml
index 135671e..c142f89 100644
--- a/core/modules/block/config/schema/block.schema.yml
+++ b/core/modules/block/config/schema/block.schema.yml
@@ -24,7 +24,6 @@ block.block.*:
       label: 'Plugin'
     settings:
       type: block.settings.[%parent.plugin]
-      type_regex: '/^[^:]*/'
 
 block.settings.*:
   type: block_settings
diff --git a/core/modules/system/config/schema/system.schema.yml b/core/modules/system/config/schema/system.schema.yml
index 0caa989..9ce8e39 100644
--- a/core/modules/system/config/schema/system.schema.yml
+++ b/core/modules/system/config/schema/system.schema.yml
@@ -375,8 +375,8 @@ block.settings.system_branding_block:
       type: boolean
       label: 'Use site slogan'
 
-block.settings.system_menu_block:
-  type: block_settings
+block.settings.system_menu_block:*:
+  type: mapping
   label: 'Menu block'
   mapping:
     level: