Question We can't switch Facing Direction to "User" after start Occlusion on iOS device

We are making AR application.
On the development,could't switch Facing Direction to "User" after start Occlusion.
We want to switch Facing Direction to "User".
If you know how to solve it,plese let me know.


We tried the following case.(Plese reference attached image)
And tried with switching scene too.

case1
AROcclusionManager enable:false
Facing Direction:World→User

result:OK


case2
AROcclusionManager enable:false
Facing Direction:User

result:OK


case3
AROcclusionManager enable:true
Facing Direction:World→User

result:NG


case4
AROcclusionManager enable:true
Facing Direction:User

result:NG


case5
AROcclusionManager enable:false→true
Facing Direction:World→User

result:NG


case6
AROcclusionManager enable:false→true
Facing Direction:User

result:NG


case7
AROcclusionManager enable:true→false
Facing Direction:World→User

result:NG


case8
AROcclusionManager enable:true→false
Facing Direction:User

result:NG


case9
AROcclusionManager enable:false→true→false
Facing Direction:World→User

result:NG


case10
AROcclusionManager enable:false→true→false
Facing Direction:User

result:NG



versions
Unity:2020.3.28f1
AR Foundation:4.1.19
ARKit Face Tracking:4.1.19
ARKit XR Plugin:4.1.19