diff --git a/src/MaaCore/Controller/AdbController.cpp b/src/MaaCore/Controller/AdbController.cpp
index 8bc45666ce..716710536d 100644
--- a/src/MaaCore/Controller/AdbController.cpp
+++ b/src/MaaCore/Controller/AdbController.cpp
@@ -427,16 +427,18 @@ bool asst::AdbController::screencap(cv::Mat& image_payload, bool allow_reconnect
             { AdbProperty::ScreencapMethod::Encode, "Encode" },
         };
         Log.info("The fastest way is", MethodName.at(m_adb.screencap_method), ", cost:", min_cost.count(), "ms");
-        json::value info = json::object {
-            { "uuid", m_uuid },
-            { "what", "FastestWayToScreencap" },
-            { "details",
-              json::object {
-                  { "method", MethodName.at(m_adb.screencap_method) },
-                  { "cost", min_cost.count() },
-              } },
-        };
-        callback(AsstMsg::ConnectionInfo, info);
+        if (m_adb.screencap_method != AdbProperty::ScreencapMethod::UnknownYet) {
+            json::value info = json::object {
+                { "uuid", m_uuid },
+                { "what", "FastestWayToScreencap" },
+                { "details",
+                  json::object {
+                      { "method", MethodName.at(m_adb.screencap_method) },
+                      { "cost", min_cost.count() },
+                  } },
+            };
+            callback(AsstMsg::ConnectionInfo, info);
+        }
         clear_lf_info();
         return m_adb.screencap_method != AdbProperty::ScreencapMethod::UnknownYet;
     } break;