I do wish our cars had a conventional parking pawl that engaged in the front final drive when in park, it worries me only relying on rear calipers, especially as the cars age.
Does the ZS EV not have this safety feature not built in then - surely it must have ?.
I would be extremely surprised if it does NOT.
What is the point of having a "P" parking function on the selector if not for this very purpose ?.
This then offers the same facility as leaving an ICE car with a manual gearbox, in gear when the engine is not running.
A second back up to support the handbrake either electronic or manual lever.
Cars with DSG ( Autobox ) has a "P" function, which does lock the transmission also.
I can't think why an electric car including the ZS EV should be any different really ?.
My drive is just long enough to take the ZS EV so I tend to apply the footbrake first, then select "N" and then power the car down.
The electronic handbrake is automatically applied on power down, I can hear the callipers being applied, then I feel comfortable to release the footbrake.
Is it possible that the OP has put the selector into "N" and then forgot to press the "P" button and the handbrake did not apply automatically ?.
Or manually pushed down on the handbrake lever, instead of pulling up to apply it ?.
One of life's unknown mystery's I guess.