By default, Flair will send a mini split (or other IR device) a set point and allow the device to maintain the set point. Some mini splits (and IR devices) don't do a good job at managing the set point, and the room temperature will be off.
If you would like Flair to manage the set point, enable Room Sense. This will allow Flair to send set points to the IR device periodically, so the room temperature is correct.