Thank you for reporting this. I followed the provided by you steps and indeed, the app is being refreshed after the InAppBrowser window is closed. This appears to be a regression introduced in the latest AppBuilder release. The good news is that it is now logged and a fix for it should be implemented soon.
Until then, the only workaround is to use the AppBuilder Companion App
for iOS in order to test such functionality inside your project.
I hope this helps.
P.S. For reporting a bug on our side, I have granted you some Telerik points.
Share what you think about AppBuilder and Telerik Platform with us in our feedback portal, so we can become even better!