Sequel CTI Association Filtering Issue

sequel_cti_isssue.rb

class Related < Sequel::Model; end

class Parent < Sequel::Model
  plugin(
    :class_table_inheritance,
    key: :type,
    table_map: {
      :Child => :children
    }
  )
  many_to_one :related
end

class Child < Parent; end

# Works
Child.first.related

# Works
Child.where(related_id: Related[1].id)

# Breaks with: WHERE ("children"."related_id" = 1)
Child.where(related: Related[1]) # Should have referenced "parents"."related_id" instead