I have been having the same problem for some time now. I was wondering if this happened to me because i have only 1 GB (out of 16 GB) free on my tablet. I’m on android and I’ve encountered it on both the web version and the PWA version of voyager. I’ve figured out that it after restarting my device all my settings return to default. This only happens with voyager, not with other web/PWA-apps. And recently it also happened with the apk-version from the app store. I still can’t find the cause for that.

I guess I will be needing a recipe…

Just two months afer I bought a kobo clara 2E, … I should have waited.