Unable to enter Korean characters that require shift key

To reproduce, enable the Korean input method in the Windows settings, and open any Qt app with a line edit. Switch the keyboard to Korean input, then attempt to type the following keys:

Shift+w, then n, then r

The shift+w should result in a ㅉ being shown, that can be combined with the n and r characters to form 쭉. In QLineEdit and similar components in Qt 6.2+, the text is immediately committed, so ㅉ is added as a separate character and it does not join with the following input.

• This issue does not exist in QtWebEngine in 6.2+ - it's only standard Qt controls
• This issue does not exist in Qt 5.15.2
• This issue does not occur on a Mac