Ace 2 Displays Only a Line After Sync

[SunsetRunner]

Brand new Ace 2 trying to set up for my son, I am able to sync it to the desktop app but afterwards both the screen and button are unresponsive and all that is shown on the screen is a white horizontal line. 

I have tried restarting the device, and resyncing it, but have had no luck so far.

[Odyssey13]

Fitbit customer support is doing their best, but right now be prepared for longer wait times. Please be patient. Support is limited by the number of representatives available at a given time and the hours of operation. Chat lines are open when they have live help.
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[Dad-s]

I just gave one to my son for his birthday.. having exactly the same issue. Either the white line or the fitbit symbol with www.fitbit.com/setup on the screen. 100% charged and synced with PC multiple times. Removed Ace2 and added again several times. Software issue?

[Ceciann]

I have this same exact issue with the Ace 2 I just bought my son. Has anyone figured out a fix yet? What say you, Fitbit?