This is my second unit (replaced with Amazon) and I am having the same exact problem. I can connect to the units and setup my login and Wireless information perfectly well. However, as soon as I connect to my WiFi in Repeater mode, it immediately disconnects and will not be discoverable again. The units maintain the blue light flashing. I have tried all kinds of settings and resets with both units to no avail.
In comparison, my MT1300 (Beryl) unit has been working flawlessly since I have received it and it was setup exactly in the same manner.
This is indicating to be a software issue. Please advise!