I have set up two virtual devices (A & B) and written three scenes:
Scene 1:
(All conditions are met)
IF
Window sensor is open
Door sensor is open
THEN
A is ON
Scene 2:
(Any condition is met)
IF
Window sensor is closed
Door sensor is closed
THEN
A is OFF
Scene 3:
(Any condition is met)
IF
sensor3 is open
sensor4 is open
A is ON
THEN
B is ON
Now, when I open the window sensor and the door sensor, virtual device A turns ON, but device B does not turn ON.
However, if I tap device A to ON in the eWelink app, device B switches ON. It looks as though one virtual device cannot control another virtual device.