VTOL Landing Direction path heading selected in SITL

i have trying to land the VTOL Plane using SITL and my setting was
RTL_AUTOLAND = 2
Q_RTL_MODE = 2
Q_FW_LND_APR_RAS = 150
Q_RTL_ALT = 50.

when reaching to Q_RTL_ALT message shows it selected an approach path of -180.0 as below.
04-Apr-22 5:13:03 PM : Throttle disarmed
04-Apr-22 5:13:03 PM : Land complete
04-Apr-22 5:12:46 PM : Land final started
04-Apr-22 5:12:33 PM : Land descend started
04-Apr-22 5:12:31 PM : VTOL position2 started v=3.2 d=4.8
04-Apr-22 5:12:18 PM : VTOL position1 v=16.5 d=135.9 h=38.8 dc=13.8
04-Apr-22 5:12:14 PM : VTOL short d=161.5
04-Apr-22 5:12:14 PM : VTOL short d=161.5
04-Apr-22 5:12:14 PM : Starting VTOL land approach path
04-Apr-22 5:12:02 PM : Selected an approach path of -180.0
04-Apr-22 5:10:13 PM : Transition FW done
04-Apr-22 5:10:12 PM : Transition airspeed reached 14.1
04-Apr-22 5:10:09 PM : Mission: 7 WP
04-Apr-22 5:09:54 PM : Land descend started
04-Apr-22 5:09:52 PM : VTOL position2 started v=3.1 d=4.7
04-Apr-22 5:09:40 PM : VTOL position1 v=15.2 d=114.8 h=144.5 dc=12.6
04-Apr-22 5:09:36 PM : VTOL short d=181.2
04-Apr-22 5:08:54 PM : Unable to start landing sequence
04-Apr-22 5:08:39 PM : Flight plan received
04-Apr-22 5:08:12 PM : Mission: 7 WP
04-Apr-22 5:07:55 PM : Flight plan received
04-Apr-22 5:06:54 PM : Mission: 10 WP

how it calculated approach heading based on wind or we can able to predefined the heading for landing?