Repo wiki: Linking to images doesn't work when page name includes a colon

I sync a wiki repo from a github project.
The wiki repo structure looks as follows:


Now when I want to embed an image in the I can just put a line

![alt text](imgs/image1.png)

but when I try to do the same in the Tutorials: Launch system page the link resolves to tutorial:imgs/image1.png and therefore it is not resolved correctly.

I haven’t found any way to link to those images with any syntax, even with html tags.
Now in this particular case I also just sync the wiki from a github project regularly, so I would also need a solution that works for both. I can edit the pages on github, but it needs to display the images on both platforms.