dry-validation: array of hashes doesn't convey the nested input

Gemfile

source 'https://rubygems.org'
gem 'dry-validation'

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    concurrent-ruby (1.0.2)
    dry-configurable (0.3.0)
      concurrent-ruby (~> 1.0)
    dry-container (0.5.0)
      concurrent-ruby (~> 1.0)
      dry-configurable (~> 0.1, >= 0.1.3)
    dry-core (0.2.1)
      concurrent-ruby (~> 1.0)
    dry-equalizer (0.2.0)
    dry-logic (0.4.0)
      dry-container (~> 0.2, >= 0.2.6)
      dry-core (~> 0.1)
      dry-equalizer (~> 0.2)
    dry-types (0.9.2)
      concurrent-ruby (~> 1.0)
      dry-configurable (~> 0.1)
      dry-container (~> 0.3)
      dry-core (~> 0.2)
      dry-equalizer (~> 0.2)
      dry-logic (~> 0.4, >= 0.4.0)
      inflecto (~> 0.0.0, >= 0.0.2)
    dry-validation (0.10.3)
      concurrent-ruby (~> 1.0)
      dry-configurable (~> 0.1, >= 0.1.3)
      dry-container (~> 0.2, >= 0.2.8)
      dry-core (~> 0.1)
      dry-equalizer (~> 0.2)
      dry-logic (~> 0.4, >= 0.4.0)
      dry-types (~> 0.9, >= 0.9.0)
    inflecto (0.0.2)

PLATFORMS
  ruby

DEPENDENCIES
  dry-validation

BUNDLED WITH
   1.12.1

test.rb

require 'dry-validation'

s = Dry::Validation.Form do
  required(:items).each do
    schema do
      required(:title).filled?(:str?)
    end
  end
end

puts s.(items: [{title: 'abc'}]).output

# => {:items=>[{}]}
# ?!?