XD Preview on iPhone refreshes every second

I am new to XD and trying to preview on device (iPhone X).  I downloaded the XD app and see that my phone is detected when I plug it in to my laptop.  However, when I load my designs using preview, the screens refreshes uncontrollably every second or two.  I made sure I have no timed transitions on my designs so not sure what it causing the refresh.  I've tried to connect my phone to my laptop using multiple wires and no luck.