Same; happened to me last week.

Its a well known graphene bug; github repo below

Best I can tell you is (what I'm now doing) is;

- screenshot your home screens often

- Bookmark all your PWA's and favs

If you start typing in what you remember you had as your home screen bookmarks/PWA's, vanadium already has those remembered in the browser (if you didn't clear your cache, etc.), which is great

That's what I did and started to add back the apps I had on there, like nsec.app, gifbuddy.lol, cashu.me, etc.

Its not a big deal, but still annoying

Github issue: https://github.com/GrapheneOS/os-issue-tracker/issues/3677