I've managed to get it working as my Joplin cloud instance and a backup for small files that I sync using AutoSync on Android. Everything else that I use it for is utter trash. Basically any native client or browser access is garbage.
If you run rclone to push encrypted backups to it, every single time you log in to the web client it freaks out, asks you if you’ve been ransomwared, and if you want to restore your files. Restore to what MS? The only state you’ve ever seen these files in is the one they’re in currently.