I encountered this problem awhile back and am just now getting around to troubleshooting it. I am using an iPad Mini with iOS 7.0.3. This issue does not occur on a Samsung Galaxy S3 or a Nexus 7 tablet. This bug occurs with KendoUI 2013.2.716 and
the most recent internal build 2013.2.1024.
On the iPad Mini, we loaded up our app website in portrait mode, and it looked normal. But when rotating the iPad to landscape mode, the top navbar suddenly lost about 50% height, so it was now half hidden. You can still scroll the content like normal, but the navbar remains half hidden. The strangest thing is that if you tap anywhere above the address bar (where the time and battery level indicators are displayed), the navbar will suddenly scroll back fully into view. What the heck is going on?
I uploaded a Youtube video
so you can see the process in action. This bug is occurring on our own web project AND on Kendo's mobile application overview demo located at http://demos.kendoui.com/mobile/m/index.html#/mobile/m/application/index.html