Printing uses crazy fonts

[RonJohn63]

Xubuntu 18.04
LO 6.1.5.2

$ fc-match -v 'Arial' | grep 'family:'
	family: "Arial"(s)

This Calc text, which looks fine on screen, is just bizarre when printed or exported to PDF, even though all the fonts are installed.

The screen view:

The print and export view:

Writer is just as bad, though different bad:

What’s going on?

[LibreTraining]

That kind of character mess usually indicates a corrupted font cache.
There is a short command to rebuild the font cache on Linux.
sudo fc-cache -f -v

Give that a try.

[RonJohn63]

That’s exactly what it was. Thanks!