[Libreoffice] Can not type accent in Greek capital letters

I added a new user to Fedora 38 desktop then he started editing a document on Libreoffice. He cannot type Greek capital letters with accent. In my account on the same pc editing on Libreoffice behaves normally. I changeed language settings on Libreoffice to Greek but the problem remains. In the same user account we tried Gedit and there is no problem there.
So is something wrong in Libreoffice i suppose. Any ideas?

I find it. It is related to the font selected. Calibri fonts was the problem. Changed to Arial problem solved