Hi Pascal,
Please try this development image containing two years of additional commits that I just uploaded online:
http://23.163.0.39/bundles/inkbox/na...0250701-dev.xz
Hopefully, it should fix the issues you're having.
To everyone reading this: if there is enough interest and you would like a development image pushed for your device, let me know. Currently, the main development effort is centered on the PineNote, but I don't want to totally declare the Kobo project as "dead", as I still push commits from time to time to the repos.