Ubuntu 19.10 w/ LibreOffice 6.3.3 , but the problem started with Ubuntu 19.04 and LibreOffice 6.2.7. I did not have this problem in Ubuntu 18.10 w/ LibreOffice 6.1.2
Since version 6.2.7 (and now in version 6.3.3), any documents I open in LibreOffice has stretched fonts – horizontally stretched in Calc, vertically stretched in Impress. If I double-click on a column separator in Calc it will autosize the column to fix the un-distorted size of the contents… which truncates the visible distorted characters. This stretching happens to all fonts, open-source or commercial, truetype or otf. No other applications on my workstation have this stretched-fonts effect.
How do I diagnose this problem? What settings in LibreOffice can I meddle with to hunt down the cause of this problem?