No-break space becomes a regular space in Markdown editor

[coziness]

A weird thing happens when I type a no-break space (Ctrl + Shift + U and then 00a0) in Joplin's Markdown editor. It simply becomes a regular space. If I type the character somewhere else and paste it into Joplin, the no-break space is preserved.

I could not reproduce the issue on Windows and on a live image of Fedora 38 KDE (using the same Joplin version stated below).

Steps to reproduce

1. Type a no-break space between two characters in Joplin's Markdown editor. E.g.: 32 GT/s
2. Shrink window: GT/s will break into a new line
3. Copy text from Joplin and paste it into a tool that can identify invisible Unicode characters
4. It will show that the "no-break space" you typed is actually a regular space
5. Type the same sentence in a different text editor, copy it and paste it into Joplin
6. Repeat steps 2 and 3
7. You will see that the no-break space is preserved

Short video showing the issue:

Operating System
Pop!_OS 22.04 LTS
Kernel: 6.5.6-76060506-generic

Joplin (and Outline plugin) version
Joplin 2.12.19 (prod, linux) — installed using installation script (Joplin_install_and_update.sh)
Revision: 7081046
Outline: 1.5.10

I'd appreciate it if you could look into this and let me know if it's a problem with my system or a bug in Joplin. Please let me know if you need additional information.

If you prefer that I create a GitHub issue, please let me know and I will do so. Thank you!

[personalizedrefriger]

Does this also happen in the note title input (or just the markdown editor)?

[coziness]

It's just the Markdown editor. I've just tried typing it in the note title input and the no-break space does not become a regular space.

[betternote]

Hi all,
I tried and it works for me

Joplin 2.12.19 (prod, linux), Debian Bullseye, Xfce
Révision : 7081046
Enhancement: 1.2.1
Favorites: 1.3.0
Quick Links: 1.2.4
Resource Search Plugin: 0.1.2
Rich Markdown: 0.13.3
Search & Replace: 2.2.0
Templates: 2.4.0