The facet has been having issue since I purchased it. The unit continuously turns on and off while idle, draining the battery. I also have had an issue where it switches modes and freezes (possibly firmware issue, believe it was fixed in v4.1) but even then I cannot use the power button to turn it off, I have to unscrew it and unplug the battery.
The flashing issue has happened on the original firmware it was loaded with, I think 3.6. I have updated to 3.11 as well but the issue persists.