Check for Plugin Conflicts: Deactivate all other plugins except “Custom Checkout Fields for WooCommerce” and WooCommerce itself. If the issue disappears, reactivate plugins one by one to identify the culprit. Consider plugin compatibility information before reactivating.
Theme Conflicts: Switch to a default WordPress theme like “Twenty Twenty-Four” to see if the problem persists. If it does, the issue likely lies with the plugin itself. If not, your theme might be interfering. Contact your theme developer for compatibility advice.
Clear Cache: Clear your browser cache and any caching plugins you might be using. Sometimes, outdated cached data can lead to unexpected behavior.
Error Logs: Enable error logging in WordPress (consult documentation if needed). This can provide valuable clues about the source of the problem.