If you're not seeing this issue from the Android version of the application, You can changed the `webview` option of your ionic app. WKWebView ===> UIWebView

First, goto (IMAB) Configuration and add the following properties:

<feature name="CDVWKWebViewEngine">
    <param name="ios-package" value="CDVWKWebViewEngine" />
</feature>
<preference name="CordovaWebViewEngine" value="CDVWKWebViewEngine" />

then run the following commands

ionic cordova plugin remove cordova-plugin-ionic-webview --save

rm -rf platforms/

rm -rf plugins/

ionic cordova build ios