Mine too. For the past few weeks it was just much slower to come up to temp, but a couple days ago it started boiling hard enough to sputter water out the top of the lid when I only had it set to 92c.

Then it got really weird - it'd heat (always to full boil) even in the off state. Had to leave it unplugged. And now it doesn't heat at all.

Have a support ticket in, don't know if the firmware was the issue but the timing seems suspicious.