QTableView not scrolling all the way to the bottom - qt

Question

I'm mocking up a table in Qt using QTableView and QStandardItemModel. The table represents events in a log. It should scroll to the bottom so that it can show the most recent event. To be clear, I am mocking up this display, I am not adding elements to the table dynamically.
When I try using either the scrollToBottom method or the scrollTo method, the view is scrolling about 3/4 of the way down, rather than to the actual bottom of the window.
Here's a simplified version of my code:
logModel = new QStandardItemModel(THREADWATCHER_LOG_TABLE_LENGTH, 2, this);
logTable = new QTableView;
for (int i = 0; i < THREADWATCHER_LOG_TABLE_LENGTH; i += 6) {
QString spawnTimeString = QString("[16:09:10:");
int spawnTimeMs = 186 + i * 8; // a pseudo-random choice for the interval between spawns
spawnTimeString.append(QString::number(spawnTimeMs) + "]");
logMessage[i] = new QStandardItem(spawnTimeString + " Thread \"Image Fetcher 0\" was spawned in the image processor ");
logModel->setItem(i, 0, logMessage[i]);
// do the same thing with [i+1], [i+2]...[i+5]
// so that I get six different messages in each iteration of the loop
}
logTable->setModel(logModel);
QModelIndex lastIndex = logMessage[THREADWATCHER_LOG_TABLE_LENGTH - 1]->index();
logTable->scrollTo(lastIndex);
I get exactly the same thing if I call logTable->scrollToBottom() instead of scrolling to the last index.
Things I've tried already:
using a single-shot timer (to ensure events have completed before scrolling)
creating a public method that calls logTable->scrollToBottom(), and having something else call that method after this class's constructor finishes (the logic above is in the constructor)