My headings h1, h2 and h3 will not display on any mobile / iPhone models above iPhone 11

Technical Q&A
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Topic summary

A Shopify store owner using the Broadcast theme is experiencing a critical display issue where heading elements (h1, h2, h3) fail to render on iPhone models 11 through 15 Pro Max. The headings briefly flash on screen before disappearing permanently.

Device-Specific Behavior:

  • Problem occurs exclusively on newer iPhones (11-15 Pro Max)
  • Headings display correctly on iPad, desktop, and older iPhone models

Current Status:

  • Issue remains unresolved
  • User has provided multiple screenshots showing where headings should appear (marked in yellow)
  • Seeking urgent assistance and willing to pay for a solution

Impact:
The missing headings make the website appear incomplete and unprofessional, creating a significant user experience problem for mobile visitors on newer devices. This appears to be a CSS/HTML rendering issue specific to certain iOS versions or device configurations.

Summarized with AI on November 9. AI used: claude-sonnet-4-5-20250929.
1

Please can someone help me asap, I am even happy to pay a small fee. As really need to get this sorted.

Headings (h1,h2,h3) do not appear on iPhone devices ranging from iPhone 11 - iPhone 15 Pro Max. They flash once and then disappear forever.

They display perfectly fine on iPad and Desktop and earlier iPhone models. Please can someone resolve asap? It makes my website look incomplete and unprofessional.

I have circled in yellow - where they should appear.

Using broadcast theme.

Website: https://madsunsea.myshopify.com/

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