When using column_box hyphenation character is being redered in last line of parargraphs

prawn hyphenation issue

require 'prawn'

class Hyphen < Prawn::Document
  
  def initialize
    super(:margin => [10,10,10,10], :page_size => 'A4')
    column_box([0, cursor], columns: 2, width: bounds.width) do
      text "This is a test where the very important Hy#{Prawn::Text::SHY}phe#{Prawn::Text::SHY}na#{Prawn::Text::SHY}tion works fine here, but which contains Hy#{Prawn::Text::SHY}phe#{Prawn::Text::SHY}na#{Prawn::Text::SHY}tion\n in the last line of the paragraph Hy#{Prawn::Text::SHY}phe#{Prawn::Text::SHY}na#{Prawn::Text::SHY}ted\n"
      bounds.move_past_bottom
      text "second column"
    end
  end
  
end

Hyphen.new.render_file('hyphentest.pdf')