New WordPress version causes visual or functional issues with the theme.
Theme Breaks After WordPress Core Update
Key Points: After updating WordPress, layout shifts, styles change, or critical errors appear — and your theme is the reason.
You click “Update WordPress” and chaos erupts. Fonts reset, widgets disappear, or templates misalign. Your theme hasn’t kept up with WordPress changes.
📉 Why It Happens
- Deprecated functions or removed hooks
- Incompatibility with new block or editor features
- Theme hasn’t been updated in months (or years)
🔧 What To Do
- Check if a theme update is available
- Contact the theme author for compatibility notes
- Use staging to test core updates before applying them live
- If theme is abandoned, consider migrating to a modern alternative
🧭 Long-Term Fix
Use themes actively maintained and compatible with latest WordPress standards. Static themes age fast in a dynamic ecosystem.