Inheritance seems broken

[sineway]

Steps to reproduce

I try to make general purpose site section, that may have any content:

# app/components/ui/base/section/view.rb
module Ui
  class Base::Section::View < ViewComponent::Base
    def initialize
      super()
      # internal stuff
    end
  end
end

/ app/components/ui/base/section/view.slim
.section
  .section__content
    = content

When I use it as is, it works as expected:

= render Ui::Base::Section::View.new do
  h1 Hello World

The strange thing happens, when I try to create another component, base on it:

# app/components/ui/base/hero/view.rb
module Ui
  class Base::Hero::View < Base::Section::View
    def initialize
      super()
      # internal stuff
    end
  end
end

I add its own template, e.g. hero/view.slim, and try to render it:

= render Ui::Base::Hero::View.new do
  h1 Hello World

The following error occurs:

undefined method 'upcase' for nil

Expected behavior

Rendered contents of the hero/view.slim template.

System configuration

Rails version:
8.1.2

Ruby version:
4.0.1

Gem version:
4.5.0