diff --git a/assets/js/report.js b/assets/js/report.js
index bdfd4111..7b7a047c 100644
--- a/assets/js/report.js
+++ b/assets/js/report.js
@@ -41,7 +41,7 @@
             name: String((cat && (cat.name || cat.label || cat.t)) || ''),
           };
         })
-        .filter(function (cat) { return cat.slug !== '' && cat.name !== ''; });
+        .filter(function (cat) { return cat.name !== ''; });
       if (items.length) return items;
     }
     return [
diff --git a/src/Settings/UserRuntime.php b/src/Settings/UserRuntime.php
index ca881667..690c56fe 100644
--- a/src/Settings/UserRuntime.php
+++ b/src/Settings/UserRuntime.php
@@ -216,14 +216,21 @@ class UserRuntime {
     public static function ban_settings(): array {
         $settings = self::read_report_section();
 
-        // 预置原因：group 数组 [{t:...}]（对齐参考主题）或旧版每行一条文本
+        // 预置原因：group 数组 [{t:...}]（对齐参考主题）或旧版每行一条文本。
+        // slug 不能用 sanitize_key(标签) 派生：中文标签会被清洗成空串，
+        // 导致前端按 slug 非空过滤后整列表被丢弃。改用标签内容的稳定短哈希
+        // （跨请求一致、可通过服务端 sanitize_key、ASCII 标签同样稳定）。
         $reasons_raw = $settings['ban_preset_reason'] ?? null;
         $reasons = [];
+        $reason_slug = static function (string $text): string {
+            $key = sanitize_key($text);
+            return $key !== '' ? $key : substr(md5($text), 0, 12);
+        };
         if (is_array($reasons_raw)) {
             foreach ($reasons_raw as $row) {
                 $text = trim((string) ($row['t'] ?? ''));
                 if ($text !== '') {
-                    $reasons[] = ['slug' => sanitize_key($text), 'name' => sanitize_text_field($text)];
+                    $reasons[] = ['slug' => $reason_slug($text), 'name' => sanitize_text_field($text)];
                 }
             }
         } else {
@@ -234,7 +241,7 @@ class UserRuntime {
                 }
                 $parts = explode('|', $line, 2);
                 $reasons[] = [
-                    'slug' => sanitize_key($parts[0]),
+                    'slug' => $reason_slug((string) ($parts[1] ?? $parts[0])),
                     'name' => sanitize_text_field($parts[1] ?? $parts[0]),
                 ];
             }
diff --git a/tests/dev/verify-ban-settings-defaults.php b/tests/dev/verify-ban-settings-defaults.php
new file mode 100644
index 00000000..6e5a006f
--- /dev/null
+++ b/tests/dev/verify-ban-settings-defaults.php
@@ -0,0 +1,73 @@
+<?php
+/**
+ * Local harness: verify UserRuntime::ban_settings() returns the schema
+ * default preset reasons when the option is empty (never saved).
+ * Run: php tests/dev/verify-ban-settings-defaults.php
+ */
+
+error_reporting(E_ALL & ~E_DEPRECATED);
+
+// ---- WP stubs ----
+$GLOBALS['__test_options'] = [];
+function get_option($key, $default = false) {
+    return $GLOBALS['__test_options'][$key] ?? $default;
+}
+function update_option($key, $value) { $GLOBALS['__test_options'][$key] = $value; return true; }
+function sanitize_key($key) { return preg_replace('/[^a-z0-9_\-]/', '', strtolower((string) $key)); }
+function sanitize_text_field($value) { return trim(strip_tags((string) $value)); }
+function sanitize_textarea_field($value) { return trim(strip_tags((string) $value)); }
+function wp_kses_post($value) { return (string) $value; }
+function __($text, $domain = null) { return $text; }
+function esc_html__($text, $domain = null) { return $text; }
+function esc_attr__($text, $domain = null) { return $text; }
+function apply_filters($tag, $value) { return $value; }
+function add_filter(...$args) {}
+function do_action(...$args) {}
+function add_action(...$args) {}
+function get_current_user_id() { return 1; }
+function is_user_logged_in() { return true; }
+function wp_unslash($value) { return $value; }
+function current_time($type) { return date('Y-m-d H:i:s'); }
+function get_theme_file_uri($file = '') { return 'https://example.test/wp-content/themes/aksrt/' . ltrim((string) $file, '/'); }
+function get_theme_file_path($file = '') { return dirname(__DIR__, 2) . '/' . ltrim((string) $file, '/'); }
+function get_template_directory() { return dirname(__DIR__, 2); }
+function esc_url_raw($url) { return (string) $url; }
+function esc_html($text) { return (string) $text; }
+function esc_attr($text) { return (string) $text; }
+
+define('ABSPATH', __DIR__ . '/');
+
+$repo = dirname(__DIR__, 2);
+
+foreach (['DomainGroups', 'DisplayPageGroups', 'CreditsPaymentGroups', 'CategoryIntegrationGroups', 'AuthReader', 'HomepageReader', 'FacadeBulk'] as $trait_file) {
+    require $repo . '/src/Settings/' . $trait_file . '.php';
+}
+require $repo . '/src/Admin/Schema/SchemaUsers.php';
+require $repo . '/src/Admin/SchemaProvider.php';
+require $repo . '/src/Settings/Settings.php';
+require $repo . '/src/Settings/UserRuntime.php';
+
+$reasons = \AKSRT\Settings\UserRuntime::ban_settings()['reasons'] ?? null;
+$report  = \AKSRT\Settings\UserRuntime::report_settings();
+
+echo "=== ban_settings()['reasons'] (empty option) ===\n";
+var_export($reasons);
+echo "\n\n=== report_settings() ===\n";
+var_export([
+    'enabled'     => $report['enabled'] ?? null,
+    'img_enabled' => $report['img_enabled'] ?? null,
+    'desc_len'    => isset($report['desc']) ? strlen($report['desc']) : null,
+]);
+
+// 再模拟“后台保存过自定义原因”的场景
+$GLOBALS['__test_options']['aksrt_settings'] = [
+    'ban_preset_reason' => [
+        ['t' => '自定义原因A'],
+        ['t' => '自定义原因B'],
+    ],
+];
+\AKSRT\Settings\Settings::flush_settings_cache();
+$stored = \AKSRT\Settings\UserRuntime::ban_settings()['reasons'] ?? null;
+echo "\n\n=== ban_settings()['reasons'] (custom stored) ===\n";
+var_export($stored);
+echo "\n";
diff --git a/tests/widget-system/report-ban-contract.test.cjs b/tests/widget-system/report-ban-contract.test.cjs
index 1f78bfe9..324843f3 100644
--- a/tests/widget-system/report-ban-contract.test.cjs
+++ b/tests/widget-system/report-ban-contract.test.cjs
@@ -108,6 +108,10 @@ test('ban/report settings page mirrors the reference theme schema', () => {
   // 缺键回退 schema 默认值（参考主题 _pz 语义）：运行时经 read_domain 读取，
   // 裸 get_all() 会让未保存过分区的站点拿不到 ban_preset_reason 默认值。
   assert.match(runtime, /read_domain\('users', 'report'\)/)
+  // 预置原因 slug 不得由 sanitize_key(标签) 直接派生：中文标签会被清洗成
+  // 空串，前端按 slug 非空过滤后整张原因列表会被丢弃。ASCII 键优先，
+  // 否则用标签内容的稳定 md5 短哈希。
+  assert.match(runtime, /md5\(\$text\)/)
   // 死链清理：user_report_categories 从不是真实存储键，解析器必须删除。
   assert.ok(!runtime.includes('parse_report_categories'), 'dead parse_report_categories must stay removed')
   assert.ok(!runtime.includes('user_report_categories'), 'dead user_report_categories key must stay removed')