Font-sizes increase to 9 for no reason

Summary:

In the Inkscape Tutorials (Inkscape: Basics), when UNDO (CTRL + Z) is pressed at the start, all the font-sizes are set to 9.

Steps to reproduce:

  • open Inkscape
  • goto "Help" > "Tutorials" > "Inkscape: Basics"
  • press CTRL + Z

What happened?

All the font-sizes are set to 9

What should have happened?

Nothing (the font sizes should have stayed the same: 12, 5.4, 6)

Sample attachments: tutorial-basic-before-image tutorial-basic-after-image

Version Info:

- Inkscape Version: 1.0 (4035a4fb49, 2020-05-01)
- Operating System: Windows 10 Pro
- Operating System version: 1909