Keyboard shortcut 1-9

The keyboard shortcut 1–9 corresponding to the desired duration doesn't work on my computer. Same for friends who downloaded MuseScore 4. I found that it's neccesary to click Shift+1 (or 2, or 3...). But it doesn't work with 6.
So, I redefined the shortcuts : replaced each number with its equivalent in lower case. On my keyboard, it gives :
& instead of 1, é instead of 2, " instead of 3, and so on... It works well!
(sorry for my poor english)