Fonts don't use relative path?

Hi,

I have a folder where I place all my files for my current Blender task.
In this folder I placed a font I used.
But if I move the folder to somewhere and open the blend file again, the font is not showing up correctly anymore.
Only if I open the font again in the Text section (of each text object I use) the font appears again.
If I look under the fonts’ path during re-assinging / reopening I see that path goes to the previous directory, so no relative path.
So how I can use relative path for fonts also?

Thanks!