I recently moved a massive Evernote archive to Joplin. It imported with few problems to the CLI and desktop apps, but on first sync to mobile I get no notebooks, only individual notes. My mobile app now has 4000+ notes, all on one level. The notebooks folder in the sidebar is empty; it's as if the tree metadata is invisible to the app.
I have tried it on both iOS (Joplin 1.7.2) and Android (Joplin 1.7.5), with the same result.
I have also tried syncing from both Nextcloud and Dropbox; identical problem. Meanwhile, the same archive syncs fine to Joplin Desktop (1.7.11) and CLI (1.7.0) on Manjaro Linux.
I browsed this forum and r/joplinapp but didn't see many posts on this particular problem. I am new to Joplin, so any help will be much appreciated.