ng-select: Selected value not shown, when keyboard has suggestion strip enabled on Android

Describe the bug When searching and selecting a value from an ng-select input, the selected value is not shown in the input. This happens only on Android, when the virtual keyboard has suggestion strip on.

To Reproduce Steps to reproduce the behavior:

1. Go to ng-select demo page
2. Click on the select under Backend data with async pipe
3. Write for example “me”
4. Click “Mendoza Ruiz”
5. See empty select input

Expected behavior The selected value is displayed.

Screenshots

Desktop:

• Does not reproduce on desktop

Smartphone:

• Device: Pixel 2
• OS: Android 10
• Browser: Chrome
• Version: 78
• Suggestion strip has to be enabled, for instance on Pixel device in Settings → System → Languages & input → Virtual keyboard → Gboard → Text correction → Show suggestion strip

Additional context It seems that the compositionstart event is fired, but a subsequent compositionend is never fired on the search input, when the option is clicked:

https://github.com/ng-select/ng-select/blob/87908d3903d8afdfe538c0f7ee1afcbd3d42bcef/src/ng-select/lib/ng-select.component.html#L38

This means, that the internal this._isComposing flag does not get turned off:

https://github.com/ng-select/ng-select/blob/87908d3903d8afdfe538c0f7ee1afcbd3d42bcef/src/ng-select/lib/ng-select.component.ts#L538-L545

This results in the selected value not being displayed due to:

https://github.com/ng-select/ng-select/blob/87908d3903d8afdfe538c0f7ee1afcbd3d42bcef/src/ng-select/lib/ng-select.component.ts#L179