CRM 2016 on premise - random errors appearing on CRM for Phones and Tablets

We have upgraded from CRM 2013 to 2016 On-premises (8.1.0.359), everything works fine for us except that we are experiencing random errors on CRM for Phones and Tablets.


Error log says:

<CrmScriptErrorReport>

<ReportVersion>1.0</ReportVersion>

<ScriptErrorDetails>

<Message>Uncaught TypeError: Cannot read property &apos;$1n8&apos; of null</Message> <Line>1</Line>

<URL>/nga/scripts/Microsoft.Crm.Client.Core.Framework.js</URL>

<CallStack>

<Function>anonymous</Function>

</CallStack> </ScriptErrorDetails>

<ClientInformation>

<BrowserUserAgent>Mozilla&#47;5.0 &#40;Linux&#59; Android 5.0.2&#59; SM-G530H Build&#47;LRX22G&#59; wv&#41; AppleWebKit&#47;537.36 &#40;KHTML, like Gecko&#41; Version&#47;4.0 Chrome&#47;45.0.2454.95 Mobile Safari&#47;537.36 OAuth MSAuthHost</BrowserUserAgent> <BrowserLanguage>en-GB</BrowserLanguage>

<SystemLanguage>undefined</SystemLanguage>

<UserLanguage>undefined</UserLanguage>

<ScreenResolution>360x640</ScreenResolution>

<ClientName>Mobile Tablet</ClientName>

<ClientTime>2016-10-26T17:09:07</ClientTime>

</ClientInformation> <ServerInformation>

<OrgLanguage>1033</OrgLanguage>

<OrgCulture>1033</OrgCulture>

<UserLanguage>1033</UserLanguage>

<UserCulture>1033</UserCulture>

<OrgID></OrgID>

<UserID></UserID>

<CRMVersion>8.1.0.359</CRMVersion>

</ServerInformation>

</CrmScriptErrorReport>