Thank you for your message.
Could you please clarify if the issue occurs only when connected to a remote Host? In addition, please let us know what version of Host you're using and the exact iOS version running on the Viewer device.
Looking forward to your reply.
Using latest versions for iOS and host as of this post.
Yes it only happens when connecting to remote host. It looks like it happens when the mouse moves across the halfway point of the screen. When it does that, the screen glitches for a second.