Icons in header rendered as glyphs instead of icons

[nithingodugu24]

Thank you for RenderCV - it really helps with creating clean and professional CVs
This is my first issue here ,so please let me know if I missed anything.

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When use_icons_for_connections: true enabled the icons in the header rendered as glyph characters instead of actual icons. Even after changing fonts, the same glyphs appear.

If we closely observe the icons , These are my private-use Unicode symbols, likely from an icon font that is not rendering correctly. So help me solving this issue.

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Minimal configuration

cv:
  name: John Doe
  location: Location
  email: john.doe@gmail.com
  phone: +91-7780452536
  website: https://nithingodugu.me/
  social_networks:
    - network: LinkedIn
      username: john.doe
    - network: GitHub
      username: nithingodugu24 
design:
  theme: classic
  page:
    size: us-letter
    top_margin: 2cm
    bottom_margin: 2cm
    left_margin: 2cm
    right_margin: 2cm
    show_page_numbering: false
    show_last_updated_date: false
  links:
    underline: false
    use_external_link_icon: false
  header:
    name_font_family: Source Sans 3
    name_font_size: 30pt
    name_bold: true
    small_caps_for_name: false
    photo_width: 3.5cm
    vertical_space_between_name_and_connections: 0.7cm
    vertical_space_between_connections_and_first_section: 0.7cm
    horizontal_space_between_connections: 0.5cm
    connections_font_family: Source Sans 3
    separator_between_connections: ''
    use_icons_for_connections: true
    use_urls_as_placeholders_for_connections: false
    make_connections_links: true
    alignment: center
locale:
  language: en
  phone_number_format: national
rendercv_settings:
  date: '2025-12-24'