Bug with 3DImage visibility on iOS

I've discovered what seems to be an iOS-specific bug. Here's the scenario:

I have a 3DImage (a warning icon) that needs to flash in the experience. I accomplish this using a $timeout that toggles the "visible" property on the widget, something like this:

$scope.blinkStatus = true;

$scope.blink = function() {
 $scope.blinkStatus = !$scope.blinkStatus;
 $scope.setWidgetProp("3DImage-1","visible", $scope.blinkStatus);
 $timeout($scope.blink, 500);
}

This works just as it should on the preview and on Android. But on iOS, if you let the blinking continue for any length of time (about a minute or so), it crashes Vuforia View completely.

It only seems to happen with 3DImage widgets. I'm able to flash a normal 2D image widget in the same way without the app crashing.

Is this a known issue? I'm going to investigate workarounds, maybe using opacity. In the meantime, I'll attach a simple project file that demonstrates the problem.