SAPUI5 : Footer Invisible on some iOS Devices

Dear All,

I have a SAPUI5 Application which has a Footer in it.

I have buttons inside the Footers for which I have used the below statement

<Footer>

<Bar>

<contentLeft> Some Buttons </contentLeft>

</Bar>

</Footer>

The footer is displayed properly in most of the iOS Devices but completely missing on some iOS Devices intermittently.

Is there any specific setting in iPhone which is to be done or has anyone faced such issue and resolved the some.

Pointers would be much appreciable.

Thanks and Regards

Jegadeesan U