Has anyone else lost the 100's column?

I was trying to do green beans yesterday…and when I got the temp to about 170-ish – the 100 column went away.  

I finalized the meal and pulled it and left it out to cool and it’s still gone.  

Is this a warranty thing?  Or did I do something wrong

I would call Technical Support. This is the first I have heard of this issue.

Same thing happened to me… I realized it switch to Celsius… I cant change it back.