Andoird App discards new bookmarks

### Which version of floccus are you using?

3.8.6

### How many bookmarks do you have, roughly?

5k

### Are you using other means to sync bookmarks in parallel to floccus?

No

### Sync method

Google Drive

### Which browser are you using? In case you are using the phone App, specify the Android or iOS version and device please.

3.8.6

### Which version of Nextcloud Bookmarks are you using? (if relevant)

_No response_

### Which version of Nextcloud? (if relevant)

_No response_

### What kind of WebDAV server are you using? (if relevant)

_No response_

### Describe the Bug

When adding bookmarks in the app, by sharing a link from a browser, it often happens that at the next sync bookmarks are deleted and disappear from everywhere.

### Expected Behavior

New bookmarks should be synced normally.

### To Reproduce

Add bookmarks from mobile browser.
Open the app so that sync starts.
Go back to the app after sync is finished: bookmarks disappeard.

I guess has something to do with the fact that bookmarks are not immideatly synced when added to the app, but requires to open the app explicitly before sync starts.

### Debug log provided

- [ ] I have provided a debug log file