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iOS: App ID gets disconnected during run (Encountered internal error running command: Error: appIdKey)

See original GitHub issue

The problem

During an ongoing run the app gets disconnected resulting in a message saying ‘Application ‘PID:2073’ disconnected. Removing from app dictionary.’

I have noticed this happening since appium-xcuitest 2.126.4 update.

After the app is reset via driver.reset_app(), the app gets attached back with a new PID and the execution continues from that point.

Environment

Appium version (or git revision) that exhibits the issue: v1.14.0-beta.2
Last Appium version that did not exhibit the issue (if applicable):
Desktop OS/version used to run Appium: Mac OS 10.14.5
Node.js version (unless using Appium.app|exe): 10.16.2
Npm or Yarn package manager: 6.9.0
Mobile platform/version under test: 12.4 iOS
Real device or emulator/simulator:iPhone X
Appium CLI or Appium.app|exe:

Details

Here are the logs:

2019-08-14 09:42:39:276 - [debug] [RemoteDebugger] Application 'PID:2073' disconnected. Removing from app dictionary.
2019-08-14 09:42:39:277 - [debug] [RemoteDebugger] Current app is PID:2073
2019-08-14 09:42:39:277 - [debug] [RemoteDebugger] No longer have app id. Attempting to find new one.
2019-08-14 09:42:43:143 - [HTTP] --> POST /wd/hub/session/b5464628-2dcf-4e88-aa33-98ff1d0c46b5/element
2019-08-14 09:42:43:143 - [HTTP] {"using":"xpath","value":"(//hi-checkbox)[1]"}
2019-08-14 09:42:43:143 - [debug] [W3C (b5464628)] Calling AppiumDriver.findElement() with args: ["xpath","(//hi-checkbox)[1]","b5464628-2dcf-4e88-aa33-98ff1d0c46b5"]
2019-08-14 09:42:43:143 - [debug] [XCUITest] Executing command 'findElement'
2019-08-14 09:42:43:144 - [debug] [BaseDriver] Valid locator strategies for this request: xpath, id, name, class name, -ios predicate string, -ios class chain, accessibility id
2019-08-14 09:42:43:144 - [debug] [BaseDriver] Waiting up to 0 ms for condition
2019-08-14 09:42:43:144 - [debug] [RemoteDebugger] Executing atom 'find_element'
2019-08-14 09:42:43:144 - [debug] [RemoteDebugger] Executing 'find_element' atom in default context
2019-08-14 09:42:43:145 - [debug] [W3C (b5464628)] Encountered internal error running command: Error: appIdKey
2019-08-14 09:42:43:145 - [debug] [W3C (b5464628)]     at RemoteDebuggerRealDevice.execute (/usr/local/lib/node_modules/appium/node_modules/appium-xcuitest-driver/node_modules/appium-remote-debugger/lib/remote-debugger.js:609:13)
2019-08-14 09:42:43:145 - [debug] [W3C (b5464628)]     at RemoteDebuggerRealDevice.execute [as executeAtom] (/usr/local/lib/node_modules/appium/node_modules/appium-xcuitest-driver/node_modules/appium-remote-debugger/lib/remote-debugger.js:387:30)
2019-08-14 09:42:43:145 - [debug] [W3C (b5464628)]     at process._tickCallback (internal/process/next_tick.js:68:7)
2019-08-14 09:42:43:145 - [HTTP] <-- POST /wd/hub/session/b5464628-2dcf-4e88-aa33-98ff1d0c46b5/element 500 2 ms - 513