What does the blinking white light on the Ember mug actually mean?

For mine the light has been blinking white for a while now but never going to solid for temp. Checked the sensor and it's shot.
 
For mine the light has been blinking white for a while now but never going to solid for temp. Checked the sensor and it's shot.

Definitely a failure mode of the mug. It's likely that the sensor or heating element on the mug is broken as the liquid will be lukewarm and the mug will not heat to temp.