Conversion API Purchase事件无法正常工作及优化失效求助

亲爱的社区成员！
我们在网站上集成Conversion API以从服务器直接向Facebook发送并追踪事件时遇到问题，具体为Purchase事件异常。

奇怪的是，除Purchase事件外，所有事件数据均能正常显示在广告Campaign表格中。我已执行测试事件，并通过Payload Helper验证，优化配置看似无误，但Purchase事件的优化仍未生效，仿佛被完全忽略。

{
  "data": [
    {
      "event_name": "Purchase",
      "event_time": 1695216450,
      "action_source": "website",
      "user_data": {
        "fbc": "fb.0.1695212450117.IwAR1yF9Jrf90FbSgflM_pJRYTgh7ZT3oymnFlrUNO40QTk86-UEnYSphNxF8_aem_AZOepfI1kP3x3UsCPVTzJ-MO0HygQ-6Vsk3yB8LwOV9PYzzhhWIYg7V1Ej4KBmwoYRxT1-6r0d7nyKtGcEiMibxh",
        "fbp": "fb.0.1695216450118.3823645",
        "country": [
          "02b0850aeac58c2cc82413170cdaf7ab69c28a00f04a8ee5744b52cd92c621e1"
        ],
        "client_ip_address": null,
        "client_user_agent": "Mozilla/5.0 (Linux; Android 12; Symphony Z60 Build/SP1A.210812.016; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/117.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/432.0.0.29.102;]"
      },
      "event_source_url": "https://somelink.com",
      "custom_data": {
        "value": 9.87,
        "currency": "USD"
      }
    }
  ]
}

内容的提问来源于stack exchange，提问作者llotall