What you’re seeing: VAT validation behaves differently on Checkout Blocks.
Steps
- Update the plugin to the latest version
- Test in an incognito window (to avoid cache)
- If needed, temporarily test with classic checkout to compare behavior
Compatibility checklist
- •Keep WooCommerce updated (Checkout Blocks change often)
- •Disable checkout field editor plugins temporarily to test conflicts
- •Make sure the VAT field is enabled in EU VAT Checker → General Settings