Embedded HTML page is not rendered on random iOS device

We embedded an HTML page in an app but occasionally/randomly on iOS device the embedded page section is not rendered and displayed as empty/blank page.
There is no error recorded in server or client side.
Current workaround is to restart the app and the page will be rendered correctly.

Any of you encounter this case before? or any advise on the specific area that we need to investigate further?

Thank you!