Hyperstack and MaterialUI Drawer Toggling State is causing the drawer to open and close repeatedly

I am implementing a title bar and menu drawer using MaterialUI in a Hyperstack project. I have two components, a Header component, and a Menu component. The Menu component is the expandable Drawer. I am storing the state in the Header component and passing it and a handler to the Menu component to toggle the drawer state when the drawers close button is clicked. For some reason, the drawer is just toggling open and closed very rapidly and repeatedly.

The drawer was opening fine before I implemented the close button. I have tried moving the state up to the main app component and passing it all the way down, but it produces the same result. I tried setting a class function on the Header component and calling it from within the Menu component instead of passing in an event handler.

The Header component

class Header < HyperComponent
  before_mount do
    @drawer_open = false
  end

  def toggle_drawer
    mutate @drawer_open = !@drawer_open
  end

  render(DIV) do
    AppBar(position: 'static', class: 'appBar') do
      Toolbar do
        IconButton(class: 'menuButton', color: 'inherit', aria_label: 'Menu') do
          MenuIcon(class: 'icon')
        end
        .on(:click) do
          toggle_drawer
        end
        Typography(variant: 'h6', color: 'inherit', class: 'grow') { 'Admin Main' }
        Button(color: 'inherit', class: 'float-right') { 'Login' } # unless App.history != '/admin'
      end
    end
    Menu(open_drawer: @drawer_open, toggle_drawer: toggle_drawer)
  end
end

The Menu component

class Menu < HyperComponent
  param :open_drawer
  param :toggle_drawer

  def menu_items
    %w(Main Inventory Customers)
  end

  def is_open?
    @OpenDrawer
  end

  render(DIV) do
    Drawer(className: 'drawer, drawerPaper', variant: 'persistent', anchor: 'left', open: is_open?) do
      IconButton(className: 'drawerHeader') { ChevronLeftIcon() }
      .on(:click) { @ToggleDrawer }

      List do
        menu_items.each do |mi|
          ListItem(button: true, key: mi) { ListItemText(primary: mi) }
        end
      end
    end
  end
end

I expected for the drawer to open on the open button click and close when the close button is clicked, but it is just opening and closing very rapidly.