Dimension text blocked out

Making progress using librecad. I am experiencing  a problem with the Dimension text. In the drawing window the dimension text shows up as a box. If I do a print or a print preview or export to a pdf the text is correctly displayed.

Version: 2.2.0.2
Compiler: GNU GCC 13.1.0
Compiled on: Jul 29 2023
Qt Version: 5.12.11
Boost Version: 1.75.0

From FAQ: If you see an empty rectangle where the dimension text should be, then check that View → Draft is not active.
In Draft mode text is simplified to boxes to speed up screen rendering.

Tried the draft mode toggle. Made no difference
Thanks
Ben

So I restarted LibreCad and the text now shows up
One thing I have noticed, when I export to a PDF file there seems to be a lot of variation in PDF viewers
I need to define the line width to ~.5mm or greater for it to be visible all viewers. Adobe seems to be correct but after that I see a lot of variation. Just an observation

Also I did reboot my computer

PDF - viewers differ in how they handle line width 0.00mm. Some show it as fine hairline, some very faint, and some not at all. At some viewers you can make a setting how to show a hair line.
In LibreCAD 0.00mm is the setting for line width out of the box. Anything larger than that should show well in a print or pdf.
I see in your shown Drawing Preferences you have General Scale at 1 and Text Height at 1. This means the drawing is set to be printed at scale 1:1 (a large plan) and with a dimension text height of 1". Now if you view the resulting pdf in the pdf viewer or even print it from there with it set to fit to paper the line width will be scaled down accordingly on screen or paper. So even a properly set standard line width of 0.25 mm may appear too faint.