Here's the link..
Uhm IDK maybe its a new thing? I am not updated in News updates, but before in Godot 3.2, when I set the orientation to "sensor_landscape" in project settings, it works without turning orientation on in my Android's Quick Panel.
When I tried to run my sample proj back to Godot 3.2 it works fine, but not in Godot 3.3.3 or 3.3.4.
I also tried turning Orientation on/off in Export settings.