I am having the same issue too, and I tried troubleshooting. Below is what I found.
Occasionally when I press the PROGRAM ABC key the display will no longer flash and everything will act as normal. However, I have to hold on to the key for it to maintain the normal stage. As soon as I let go, the display will disappear and go back to the flashing issue.
I am thinking might have something to do with the power adapter inside the unit…. I bought this unit around mid-2015 to late-2015.
Please let me know what to do. I will try calling support as well.