Created attachment 151647 [details]
letter "O" is not shown up in the word.

SUMMARY
Background of the chosen letter is marked green but the letter doesn't show up in the word. (see screenshots). 

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STEPS TO REPRODUCE
1. Start KHangman in Hungarian
2. Chose letters, the issue comes randomly
3. 

OBSERVED RESULT
Background of the chosen letter is marked green but the letter doesn't show up in the word. (see screenshots). 

EXPECTED RESULT
The letter with green background shows up in the word.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION