How to turn off QAbstractButton animateClick when lineEdit has focus

I am new to QT GUI programming and I am using QT Creator. The problem I am seeing is with my pushbutton and line edit when the user presses the enter key. My program opens a groupbox and allows the user to enter a password and press ok or cancel.

If the user presses the enter key when the line edit has focus, the program seems to emit a second signal for QAbstractButton animateClick(); So when the next group box opens and prompts the user to press ok or cancel, the program continues as if the user pressed the ok button.

I set up my Push buttons to allow the user to press the tab key and hit the enter key. In order to obtain this functionality I set okbutton->setAutodefault(true); and cancelButton->setAutodefault(true);

I also have a lineEdit for the user to enter a password and press enter. I set this up by connecting the return pressed signal to the ok button shown below.

connect(lineEdit, SIGNAL(returnPressed()), okButton, SIGNAL(clicked()));
I also tried to connect return pressed signal directly to the slot but the problem still occurs.

connect(lineEdit, SIGNAL(returnPressed()), this, SLOT(chkPassword()));
If the user clicks the okButton with the mouse or I set okButton->setAutoDefault(false); the program functions as it should. I would like to know if it is possible to disable the animateClick signal that occurs when the line edit has focus.

Any help with this would be greatly appreciated.