[REG 5.15-6.3] Qt6.3.1 Application Default trigger Chinese input method

 
I used Qt5.15.2 before, and it works normally. But after upgrading to Qt6.3.1, when there is no focus on any inputable control, I directly input English letters, and the input field of Chinese input method will be displayed. It seems that the key is blocked by the input method, and the shortcut keys of pure English letters cannot be used. I also have this problem when I use the project in qtbase \ examples \ widgets \ dialogs \ tabdialog.

I also tried a simple project. I switched the QT version. It was normal on Qt5.15.2 and there was this problem on Qt6.3.1.
 
The attachment picture is the performance on QT6.3.1. The input selection in the red box should not have appeared.