使用中报错[E 210423 13:23:18 _relay:46] connect to device error: UsbmuxReplyCode.ConnectionRefused

数据线使用的作者推荐的绿联的
[D 210423 13:23:14 _wdaproxy:116] [00008030-0003591402D9802E] launch WDA
[I 210423 13:23:14 _device:990] BundleID: com.facebook.WebDriverAgentRunner.xctrunner
[I 210423 13:23:14 _device:992] DeviceIdentifier: 00008030-0003591402D9802E
[D 210423 13:23:14 _relay:36] handle stream from: ('127.0.0.1', 60376)
[E 210423 13:23:14 _relay:46] connect to device error: UsbmuxReplyCode.ConnectionRefused
[I 210423 13:23:14 _device:572] ProductVersion: 14.4
[I 210423 13:23:14 _imagemounter:81] Pushing DeveloperDiskImage.dmg
[I 210423 13:23:15 _imagemounter:94] Push complete
[D 210423 13:23:15 _relay:36] handle stream from: ('127.0.0.1', 60400)
[E 210423 13:23:15 _relay:46] connect to device error: UsbmuxReplyCode.ConnectionRefused
[I 210423 13:23:15 _device:646] DeveloperImage mounted successfully
[D 210423 13:23:16 _relay:36] handle stream from: ('127.0.0.1', 60411)
[E 210423 13:23:16 _relay:46] connect to device error: UsbmuxReplyCode.ConnectionRefused
[I 210423 13:23:16 _device:834] SignIdentity: 'Apple Development: Yao Wang (YY4LSB23HQ)'
[I 210423 13:23:16 _device:840] CFBundleExecutable: WebDriverAgentRunner-Runner
[I 210423 13:23:17 _device:871] AppContainer: /private/var/mobile/Containers/Data/Application/79DFE33C-85B6-4575-96CD-51D081F79B7E
[I 210423 13:23:17 _device:911] Launch 'com.hualai.WebDriverAgentRunner.xctrunner' pid: 279
[I 210423 13:23:17 _device:1086] ProductVersion: 14.4
[D 210423 13:23:17 _relay:36] handle stream from: ('127.0.0.1', 60425)
[E 210423 13:23:17 _relay:46] connect to device error: UsbmuxReplyCode.ConnectionRefused
[I 210423 13:23:17 _device:1041] Test runner ready detected
[I 210423 13:23:17 _device:1034] Start execute test plan with IDE version: 29
[D 210423 13:23:18 _relay:36] handle stream from: ('127.0.0.1', 60429)
[E 210423 13:23:18 _relay:46] connect to device error: UsbmuxReplyCode.ConnectionRefused
[I 210423 13:23:18 _device:947] WebDriverAgent start successfully
[D 210423 13:23:19 _relay:36] handle stream from: ('127.0.0.1', 60435)
[D 210423 13:25:07 _relay:36] handle stream from: ('127.0.0.1', 60470)
[D 210423 13:25:07 _relay:36] handle stream from: ('127.0.0.1', 60472)
[D 210423 13:32:15 _relay:36] handle stream from: ('127.0.0.1', 60530)
[D 210423 13:32:15 _relay:36] handle stream from: ('127.0.0.1', 60532)
[D 210423 13:41:00 _relay:36] handle stream from: ('127.0.0.1', 60705)
[D 210423 13:41:00 _relay:36] handle stream from: ('127.0.0.1', 60707)

Review the _relay connection path alongside the _wdaproxy and _device startup logs; the report shows repeated UsbmuxReplyCode.ConnectionRefused while DeveloperImage and WDA still start. Reproduce with the reported iOS 14.4 device and examine the _imagemounter and device-startup sequence; done means the connection failures are explained and a confirmed fix or documented reproduction is available.

Written by the indexing model from the issue text.