getPageSource is empty on iOS

The problem

Hello,

I have a problem when I want to get page source on Appium with a Real iOS devices ().

It return only the root element (with the bad tagname XCUIElementTypeOther insteadof XCUIElementTypeApplication)

Environment

• Appium version (or git revision) that exhibits the issue: 1.10.0
• Last Appium version that did not exhibit the issue (if applicable): /
• Desktop OS/version used to run Appium: Mac OS Mojave
• Node.js version (unless using Appium.app|exe): v8.12.0
• Mobile platform/version under test: iOS 11.2.6
• Real device or emulator/simulator: Real Device
• Appium CLI or Appium.app|exe: with appium java-client:7.0.0

Details

When I call getPageSource(), I receive that :

<?xml version="1.0" encoding="UTF-8"?>
<AppiumAUT>
 <XCUIElementTypeOther type="XCUIElementTypeOther" name="Auchan" label="Auchan" enabled="true" visible="true" x="0" y="0" width="375" height="667" />
</AppiumAUT>

who corresponding to this screen (I have the problem only on this screen):

Perhaps it is an element who is not managing by appium ? It is the first screen I test with a list on iOS

On other screen of my application, I usually receive that :

<?xml version="1.0" encoding="UTF-8"?>
<AppiumAUT>
 <XCUIElementTypeApplication type="XCUIElementTypeApplication" name=" " label=" " enabled="true" visible="true" x="0" y="0" width="375" height="667">
   <XCUIElementTypeWindow type="XCUIElementTypeWindow" enabled="true" visible="false" x="0" y="0" width="375" height="667">
     <XCUIElementTypeOther type="XCUIElementTypeOther" enabled="true" visible="false" x="0" y="0" width="375" height="667">
       <XCUIElementTypeOther type="XCUIElementTypeOther" enabled="true" visible="false" x="0" y="0" width="375" height="667" />
     </XCUIElementTypeOther>
   </XCUIElementTypeWindow>
   <XCUIElementTypeWindow type="XCUIElementTypeWindow" enabled="true" visible="false" x="0" y="0" width="375" height="667">
     <XCUIElementTypeOther type="XCUIElementTypeOther" enabled="true" visible="false" x="0" y="0" width="375" height="667">
       <XCUIElementTypeOther type="XCUIElementTypeOther" enabled="true" visible="false" x="0" y="0" width="375" height="667">
         <XCUIElementTypeOther type="XCUIElementTypeOther" enabled="true" visible="false" x="0" y="0" width="375" height="667" />
       </XCUIElementTypeOther>
     </XCUIElementTypeOther>
     <XCUIElementTypeOther type="XCUIElementTypeOther" enabled="true" visible="false" x="0" y="0" width="375" height="667" />
   </XCUIElementTypeWindow>
   <XCUIElementTypeWindow type="XCUIElementTypeWindow" enabled="true" visible="false" x="0" y="0" width="375" height="667">
     <XCUIElementTypeOther type="XCUIElementTypeOther" enabled="true" visible="false" x="0" y="0" width="0" height="0">
       .......
     </XCUIElementTypeOther>
   </XCUIElementTypeWindow>
   <XCUIElementTypeWindow type="XCUIElementTypeWindow" enabled="true" visible="false" x="0" y="0" width="375" height="667">
     <XCUIElementTypeOther type="XCUIElementTypeOther" enabled="true" visible="false" x="0" y="0" width="375" height="667" />
   </XCUIElementTypeWindow>
 </XCUIElementTypeApplication>
</AppiumAUT>

Link to Appium logs

Appium log : https://gist.github.com/nicodeur/89a3bb62ca3c0f9ab270eb98b7541703

Code To Reproduce Issue [ Good To Have ]

I execute it from Cerberus

[nicodeur]

After more investigation, I tested on an other device (iOs 12.0.1).

getPageSource works ! But I have a big list who was load (103 elemt). Appium click can click on an element, but it is very slow (between 150 to 300 seconds for a simple click !)

After I filtered elements of my list (1 result), I can click quickly.

Any idea ?

[uterator]

Server logs on this issue

[HTTP] {}
[MJSONWP (3d194592)] Calling AppiumDriver.getSession() with args: ["3d194592-8ce3-4b56-80f5-a3dc9e1315bf"]
[XCUITest] Executing command 'getSession'
[WD Proxy] Got response with status 200: {"value":"*** -[__NSDictionaryM setObject:forKey:]: object cannot be nil (key: top)\n\n(\n\t0   CoreFoundation                      0x0000000182a48edc  + 252\n\t1   libobjc.A.dylib                     0x0000000181c19a40 objc_exception_throw + 56\n\t2   CoreFoundation                      0x00000001829c0494 _CFArgv + 0\n\t3   CoreFoundation                      0x0000000182933a30  + 932\n\t4   WebDriverAgentLib                   0x0000000102ad1f64 +[FBXPath writeXmlWithRootElement:indexPath:elementStore:includedAttributes:writer:] + 2472\n\t5   WebDriverAgentLib                   0x0000000102ad0d50 +[FBXPath xmlRepresentationWithRootElement:writer:elementStore:query:] + 436\n\t6   WebDriverAgentLib                   0x0000000102ad0370 +[FBXPath matchesWithRootElement:forQuery:] + 284\n\t7   WebDriverAgentLib                   0x0000000102ae8ca8 -[XCUIElement(FBFind) fb_descendantsMatchingXPathQuery:shouldReturnAfterFirstMatch:] + 216\n\t8   WebDriverAgentLib                   0x000000010...
[WD Proxy] Got an unexpected response: {"value":"*** -[__NSDictionaryM setObject:forKey:]: object cannot be nil (key: top)\n\n(\n\t0   CoreFoundation                      0x0000000182a48edc  + 252\n\t1   libobjc.A.dylib                     0x0000000181c19a40 objc_exception_throw + 56\n\t2   CoreFoundation                    ...
[MJSONWP] Matched JSONWP error code 13 to UnknownError
[XCUITest] Merging WDA caps over Appium caps for session detail response
[MJSONWP (3d194592)] Responding to client with driver.findElements() result: []
[HTTP] <-- POST /wd/hub/session/3d194592-8ce3-4b56-80f5-a3dc9e1315bf/elements 200 35872 ms - 74
[HTTP] 
[XCUITest] Merging WDA caps over Appium caps for session detail response