ActiveStorage attachment is present, but showing `nil` in Datagrid column

Question

user.rb

class User 
  has_one_attached :avatar
end

Inspected the same user in rails console @user.avatar.attached? => true

but displaying false for all users in datagrid column.

class UserGrid

  scope  do
    User.joins(:avatar_attachment)
  end

  column(:avatar, html: true, header: 'Avatar') do |record|
    if record.avatar.attached?
      concat link_to(
        'image_tag(url_for(record.avatar))',
        record.avatar_url,
        target: '_blank'
      )
    end
  end
end

Inspected record.avatar.attached? from datagrid column, getting false

Requirement: Display all User records that have an attachment and also display attachment in grid column.

Issue: As attachment is showing nil, so unable to display attachment in grid.