Is there a setting somewhere that would stop the annoying linebreak that occurs with file/folder names in the desktop folder widget.
I never saw this issue in KDE 4 but can't work out how to get rid of it in plasma 5

Font setting - General is set to Sans Serif 8 (I believe that is noto sans with the recent font pattern update) but also presents with the prev default Oxygen font.

If I reduce the font size to 7 the line break is not corrected

This only occurs in the desktop widget. Dolphin itself the line breaks are as they should be