diff --git a/src/ble/discovery.js b/src/ble/discovery.js
index 56d595d..5985aeb 100644
--- a/src/ble/discovery.js
+++ b/src/ble/discovery.js
@@ -106,9 +106,9 @@ export function createBluetoothDiscovery(options = {}) {
         return left.hasTargetService ? -1 : 1
       }
 
-      const leftSignal = typeof left.RSSI === 'number' ? left.RSSI : -999
-      const rightSignal = typeof right.RSSI === 'number' ? right.RSSI : -999
-      return rightSignal - leftSignal
+      // 同组内保持首次发现顺序（对象键插入序稳定）。
+      // 不按 RSSI 排序：信号强度逐包抖动会让卡片反复换位跳动
+      return 0
     })
   }
 
@@ -248,13 +248,13 @@ export function createBluetoothDiscovery(options = {}) {
   function getDeviceStableSignature(device = {}) {
     return [
       device.deviceId || '',
-      device.RSSI ?? '',
       device.name || '',
       device.localName || '',
       Array.isArray(device.advertisServiceUUIDs)
         ? device.advertisServiceUUIDs.map((item) => normalizeUuid(item)).sort().join('|')
         : '',
       device.advertisData ? JSON.stringify(Array.from(new Uint8Array(device.advertisData))) : ''
+      // RSSI 逐包抖动，不参与变更签名：避免同一设备反复触发列表刷新
     ].join('#')
   }