Dear emccorson Thanks for your answer. The screen issue on iPhone X in WKWebView already existed in Cordova 9, but it has not been fixed and it also exists in Cordova 10. The problem temporary fixed if the app is down to the taskbar and reopened. But if the app is completely closed by the taskbar and reopened, the issue returns. After much searching I have found if it is added to the style -the following code- then the issue is fixed… but this is something temporary… <style> html, body { width: 100vw; height: 100vh; } </style>