Problem with links to local file system in Windows 11 and TiddlyDesktop

I have a problem in TiddlyDesktop with links to the local file system that contain special characters like ä, Ü, á and so on.

These two links

[ext[Schneemann|Schneemann.jpg]]
[ext[Schneemanner|Schneemännder.jpg]]

work fine in Chrome, Firefox and Edge. But in TiddlyDesktop only the first one works. The same with

<a href="Schneemann.jpg" target="_blank">Schneemann</a>
<a href="Schneemänner.jpg" target="_blank">Schneemänner</a>

The first one works, the second one does’nt work in TiddlyDesktop, but in Chrome, Firefox, Edge. Also the use of URI encoding (Schneem%C3%A4nner.jpg) doesn’t help.

Astonishingly, the same uri works for the image widget in wikitext, even in TiddlyDesktop:

[img[Schneemänner.jpg]]

There is a topic with the same issue: Links to Internal Files (via file:///) in Windows 10. But the solution mentionned there is more an awkward workaround than a solution.

Is it possible to solve the problem in TiddlyDesktop?

Apart of this, I am an enthusiastic user of TiddlyDesktop and I appreciate it very much.

Windows 11 home 23H2
TiddlyWiki 5.3.3
TiddlyDesktop 0.0.20