Thermostat question - missing 17.5C?

This is probably a dumb question but my Wyze thermostate won’t show 17.5C. :slight_smile:

It’ll go 16.5, 17, 18, 18,5, 19, 19.5, …

But no 17.5.

It’s definitely not a huge thing, I was just curious if this is a bug or there’s a reason for it.