overtyper | automatic insertion of timed transcript corrections | Frontend Framework library

I'm having an async event handler that is triggered in my input field whenever the text changes. This is a Xamarin.Forms application and I am using the event handler TextChanged in order to simulate "over-type" functionality in my Entry, as for example writing the text when insert key in active. However, this sometimes causes the application to deadlock after the await Task.Yield() call. This call is needed to get the correct behavior, otherwise the caret doesn't go into the correct position after the call is executed. I can't figure out why does the code hand and how to fix this issue, so any help/advice will be appreciated. I'm guessing the issue has to do with my insufficient async programming knowledge.