[TIMOB-5904] iOS: TableViewRow disappears after being quickly scrolled off and on screen

TableViewRow disappears after being quickly scrolled off and on screen. Does not happen in 1.7.4 or iOS. 1. Create app with script:

Titanium.UI.setBackgroundColor('#000');
var win = Titanium.UI.createWindow();
var rows = [];
for (var i = 0; i < 200; i++) {
    rows[i] = Titanium.UI.createTableViewRow({className:'test'});
    rows[i].add(Titanium.UI.createLabel({text:'row ' + i}));
}
var table = Titanium.UI.createTableView({data:rows});
win.add(table);
win.open();

2. launch app on device 3. fast scroll the table a few times, it happens roughly 4 out 10 times [see screenshot] Results: the rows closer to the bottom of the screen fail to render when they return to view Expected: the rows should all redraw