Please submit a trouble ticket http://support.rabbx.com/support/tickets/new and fill out all the fields. It is working on our device with 8.3, so we'll need the specifics of your situation, so that we can try to determine what the problem is. Also, please let us know what happens when you orient the device in different positions.
We believe this problem is now fixed. If you are still encountering this problem, please submit a trouble ticket.