I had a similar problem recently in our 2012. The only way to get the AC turn off was to turn the fan speed all the way down, - basically turn the climate control system off. As soon as I turned the fan speed up a single notch, the AC would come back on. It didn't matter what I had the temp set at. In fact, if I set the temp up high enough, both the AC and the heat would be on.
An old post suggested that it might have something to do with having auto-defog checked but I turned that off and it didn't fix it. What finally did was manually selecting one of the venting options (floor vs dash vs defog). After that, the AC turned on and off as expected.
The problem hasn't come back for a couple of weeks. I suspect it is some sort of software glitch. It may have been triggered by the fact that auto-defog was on but turning that off by itself didn't clear it.