I believe it also does this as part of the auto window defog when the humidity in the cabin is detected to be high. The system will switch to outside air for a bit until the humidity comes down and then switch back. It's a setting in the climate control options you can turn off.
From the owner's manual, this is what I was referring to:
Auto dehumidify (if equipped)
To increase cabin air quality and reduce
windshield misting, recirculation mode
switches off automatically after about 5
to 30 minutes, depending on the outside
temperature, and the air intake will
change to fresh mode.
Turning Auto Dehumidify ON or OFF
Climate control system
To turn the Auto Dehumidify feature
on or off, select Face level ( ) mode
and press the air intake control ( )
button at least five times within three
seconds. When Auto Dehumidify is
turned on, the air intake control button
indicator will blink 6 times. When turned
off, the indicator will blink 3 times.
Infotainment system
Auto Dehumidify can be turned on and
off by selecting ‘Setup → Vehicle Settings
→ Climate → Automatic Ventilation →
Auto Dehumidify’ from the infotainment
system screen.