System.exit() doesn't work inside the onTimerReset() method

I have a datafield app specifically for Edge devices. I'd like to reset my datafield values upon activity save/discard. Currently, I'm doing manual resetting of all fields inside the Datafield.onTimerReset() method. It works but it sometimes takes too much time to reinit values, so I decided to try just System.exit() inside the onTimerReset() method to let values self init upon the next app start.

Surprisingly, it does not work - after hitting Save/Discard buttons on the Edge device my datafield still displays data from the finished activity which means that old values are still in memory.

I added a simple debug println statement and ran the app in the sim

    // Triggered on timer reset.
    public function onTimerReset() as Void {
        if(true) {
            System.exit();
        }
        System.println("Still alive!");
    }

and it printed out