If you tab out of a QLineEdit that is blank, caret continues to blink.  Can affect multiple blank fields which looks really weird.  All attempts to remove it in code failed.  QTextEdit does not have this problem.

Looking in forums, there are multiple chronic problems with blinking cursor display. Some people don't want it and it's not easy to remove. Or change color, appearance etc.

It would be nice to have separate access to both the blinking caret and the mouse cursor.  Right now no properties reach the blinker. Probably applies to both QLineEdit and QTextEdit.