Depending on conditions it is usually in MILD; defrost button forces fresh mode.
If main AUTO mode is modified (fan speed or direction) air inlet should still stay in AUTO.
For example changing fan speed still keeps air direction in automatic (it does change even without AUTO LED).
AUTO circulation is canceled if circulation button has been pushed.
AUTO circulation is activated with either long press of circulation or main AUTO mode button.
I believe it has memory after shutdown.
MILD recirculation depends on AC cooling active or not. If it is not then 30% is chosen if direction
is not in defrost and outside 14C or less (57.2F). Above that always fresh.
If AC LED is on: same behavior below 14C. Above that recirc constantly changing depending on AC demand.
Long press is AUTO mode. It is not ignored. AUTO mode is not the same as pressing twice so FRESH is shown on screen).The recirc button ignored the long press and didn't even turn on the recirculation.