Hi dale,
That certainly sounds like a bad power connection to the gauge. There are two power inputs to that MD085 - switched 12V and constant 12V. There is also the ground connection. Check your connections to the power leads on the Acewell. Make sure that they are solidly attached.
Are you grabbing power through the BEP? If so, it might or might not be contributing to your problem. To eliminate the BEP as a potential problem source, try to temporarily obtain power from a different source. If the flashing problem remains, it isn't caused by the BEP. If the flashing problem disappears, the problem was the BEP.