唤起 APP 失效，怀疑弹窗 button click 失准（日志加粗部分）

**测试环境：**
测试机：iphone6 , iOS 12.3.1
airtest ：1.2.2
iOS-Tagent commit id ：d3adb60
Xcode：10.3
**测试场景及步骤**
前置条件：
在 iOS 手机自带的 Files 应用中打开一个 html 文件，html 文件中是一个APP scheme 。
预期：
点击链接可唤起 APP
实际结果：
在 Airtest 中操作，没有唤起 APP ；直接在手机上操作，可以唤起 APP 没有问题
截图如下：
**日志如下**
'com.apple.DocumentsApp'
t = 5234.06s Snapshot accessibility hierarchy for app with pid 395
t = 5234.24s Snapshot accessibility hierarchy for app with pid 395
2019-11-21 11:31:48.579866+0800 WebDriverAgentRunner-Runner[242:4072] tapPoint:236.731844,390.712291
2019-11-21 11:31:48.580053+0800 WebDriverAgentRunner-Runner[242:4072] cost time = 0.209093 ms
t = 5234.53s Checking existence of `Window`
t = 5234.54s Snapshot accessibility hierarchy for app with pid 395
t = 5234.61s Find the Window
t = 5234.62s Snapshot accessibility hierarchy for app with pid 395
t = 5234.72s Find the Window at {{0.0, 0.0}, {375.0, 667.0}}
t = 5234.72s Snapshot accessibility hierarchy for app with pid 395
2019-11-21 11:31:48.872434+0800 WebDriverAgentRunner-Runner[242:4072] cost time1 = 292.577028 ms
t = 5234.82s Tap Window at {{0.0, 0.0}, {375.0, 667.0}}[0.00, 0.00] -> (236.7, 390.7)
t = 5234.82s Wait for com.apple.DocumentsApp to idle
t = 5234.85s Find the Window at {{0.0, 0.0}, {375.0, 667.0}}
t = 5234.85s Snapshot accessibility hierarchy for app with pid 395
t = 5234.94s Check for interrupting elements affecting Window
t = 5234.96s Snapshot accessibility hierarchy for app with pid 395
t = 5235.04s Find: Descendants matching type Alert
t = 5235.09s Handle interrupting element
t = 5235.09s Find the "Leave Files and open this link?" Alert
t = 5235.09s Snapshot accessibility hierarchy for app with pid 395
t = 5235.17s Find: Descendants matching type Alert
t = 5235.17s Find: Identity Binding
t = 5235.18s Checking existence of `Button`
t = 5235.18s Snapshot accessibility hierarchy for app with pid 395
t = 5235.26s Find: Descendants matching type Alert
t = 5235.27s Find: Identity Binding
t = 5235.27s Find: Descendants matching type Button
t = 5235.27s Find: Elements matching predicate 'userTestingAttributes CONTAINS "cancel-button"'
t = 5235.28s Checking existence of `Button`
t = 5235.28s Snapshot accessibility hierarchy for app with pid 395
t = 5235.37s Find: Descendants matching type Alert
t = 5235.37s Find: Identity Binding
t = 5235.37s Find: Descendants matching type Button
t = 5235.38s Find: Elements matching predicate 'userTestingAttributes CONTAINS "cancel-button"'
t = 5235.39s Default interruption handler attempting to dismiss alert by tapping Button.
t = 5235.39s Tap Button
t = 5235.39s Wait for com.apple.DocumentsApp to idle
t = 5235.41s Find the Button
t = 5235.42s Snapshot accessibility hierarchy for app with pid 395
t = 5235.50s Find: Descendants matching type Alert
t = 5235.51s Find: Identity Binding
t = 5235.51s Find: Descendants matching type Button
**t = 5235.52s Find: Elements matching predicate 'userTestingAttributes CONTAINS "cancel-button"'**
**t = 5235.55s Check for interrupting elements affecting "Cancel" Button**
t = 5235.57s Snapshot accessibility hierarchy for app with pid 395
t = 5235.64s Find: Descendants matching type Alert
t = 5235.67s Synthesize event
t = 5235.77s Wait for com.apple.DocumentsApp to idle
t = 5236.24s Waiting 10.0s for Alert to not exist
t = 5237.24s Checking `Expect predicate `exists == 0` for object Alert`
t = 5237.25s Checking existence of `Alert`
t = 5237.26s Snapshot accessibility hierarchy for app with pid 395
t = 5237.34s Find: Descendants matching type Alert
t = 5237.86s Snapshot accessibility hierarchy for app with pid 395
t = 5237.97s Check for interrupting elements affecting Window
t = 5237.99s Snapshot accessibility hierarchy for app with pid 395
t = 5238.05s Find: Descendants matching type Alert
t = 5238.06s Synthesize event
t = 5238.06s Find the Window
t = 5238.06s Snapshot accessibility hierarchy for app with pid 395
t = 5238.22s Wait for com.apple.DocumentsApp to idle
2019-11-21 11:31:52.326668+0800 WebDriverAgentRunner-Runner[242:4072] cost time2 = 3746.783018 ms
t = 5238.36s Find the Application 'com.apple.DocumentsApp'
t = 5238.36s Snapshot accessibility hierarchy for app with pid 395
t = 5238.51s Snapshot accessibility hierarchy for app with pid 395
t = 5240.77s Find the Application 'com.apple.DocumentsApp'
t = 5240.77s Snapshot accessibility hierarchy for app with pid 395
t = 5240.97s Snapshot accessibility hierarchy for app with pid 395
t = 5243.24s Find the Application 'com.apple.DocumentsApp'
t = 5243.24s Snapshot accessibility hierarchy for app with pid 395