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    Bug 
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    Resolution: Done
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    P2: Important 
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    5.6.3, 5.7.0, 5.8.0 Beta, 5.12.3, 5.12.10, 5.15.3, 6.0.3, 6.2
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    macOS 10.11, 10.15
 
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        c67f46877c72d1c04cb643f33e820d86e64128d1 (qt/qtbase/dev) 0b50fa57ca8e92b661b962d7d2fdc6aaabf92ae5 (qt/qtbase/6.2)
Steps to reproduce the issue:
1. Change macOS Input Source to Korean
2. Launch attached test application
3. Type some text and click on the button
Expected outcome:
Button click event goes through
Actual outcome:
Only the second click event is going through 
Tested on macOS 10.11.6