Sendkeys not sending keys consistently WebDriverAgent (iOS-XCUITest)

Question

I am automating an iOS application. Please find the versions of the applications:

Appium CLI: 1.9.1
WebDriverAgent: The same that came with Appium CLI.
MacOS: 10.14.1
iOS version: 10.3.3
Device: iPad
Driver: XCUITest (WebDriverAgent)

Problem experiencing:

When I am using element.sendkeys("Prakash"), it's either entering "rakash" or "Prkash" or "Praksh". It's never consistent. It's happening for all the fields.

I have reinstalled webdriveragent multiple times, but has not helped.

Is anybody aware of this problem?

Thanks in advance.

Please find the logs from iOS real device:

2018-11-27 15:57:03:266 - [debug] [JSONWP Proxy] Matched '/element/1E000000-0000-0000-B00A-000000000000/value' to command name

'setValue' 2018-11-27 15:57:03:266 - [debug] [JSONWP Proxy] Proxying [POST /element/1E000000-0000-0000-B00A-000000000000/value] to [POST http://localhost:8100/session/0DFDAB38-2909-4D3C-AB87-F5493252D239/element/1E000000-0000-0000-B00A-000000000000/value] with body: {"value":["x","x","x","x","x","x","x","x","x","1","2","3"]} 2018-11-27 15:57:03:279 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO testmanagerd[2729] : 2018-11-27 15:57:03:279 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO testmanagerd[2729] : 2018-11-27 15:57:03:280 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO testmanagerd[2729] : 2018-11-27 15:57:03:280 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO testmanagerd[2729] : 2018-11-27 15:57:03:280 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO testmanagerd[2729] : 2018-11-27 15:57:03:280 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO testmanagerd[2729] : 2018-11-27 15:57:03:280 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO testmanagerd[2729] : 2018-11-27 15:57:03:281 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO testmanagerd[2729] : 2018-11-27 15:57:03:281 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:282 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:283 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:284 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:285 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:285 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:286 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:287 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:287 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:288 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:289 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:289 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:290 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:290 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:291 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736} 2018-11-27 15:57:03:291 - [iOSLog] [IOS_SYSLOG_ROW] Nov 27 23:57:03 GTO salesApp(UIAccessibility)[2736] : This child can't be serialized correctly: {pid=2736}

Answer 1

desired_caps = {
                "platformName": "iOS",
                "platformVersion": "16.4",
                "deviceName": "iPhone 14",
                "automationName": "XCUITest",
                "bundleId": "",
                "udid": "",
                "maxTypingFrequency": 30
}

Adding maxTypingFrequency solve it, the default is 60 so try slowing it down, the safest in my case is 30, but try to adjust it base on your simulators performance.