Nextcloud Client (macOS) showing Issues with account when using virtual files

### ⚠️ Before submitting, please verify the following: ⚠️

- [x] This is a **bug**, not a question or a configuration issue.
- [x] This issue is **not** already reported on Github (I have searched for it).
- [x] Nextcloud Server and Desktop Client are **up to date**. See [Server Maintenance and Release Schedule](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) and [Desktop Releases](https://nextcloud.com/install/#install-clients) for supported versions.
- [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/)

### Bug description

The Nextcloud Sync Client on macOS shows "issues with several accounts". After restarting the client, it sometimes works for a short time but then the error returns. As far as I can tell, the client is syncing correctly but it is definitely quite irritating to always have the exclamation mark showing and there is definitely something wrong. This started happening after I switched from using standard sync to the VFS implementation, but I made sure to first unsync all folders and remove the folder sync connection and then I enabled VFS.

### Steps to reproduce

1. Using macOS, switch between Standard Sync and VFS
2. expand the tray icon of Nextcloud
3. see the error report "issues with Account..." or sometimes even "issues with several accounts"

### Expected behavior

the client should not show any errors when I'm connected to the internet and all servers are acessible.

### Which files are affected by this bug

none as far as I can tell

### Operating system

macOS

### Which version of the operating system you are running.

15.7.7

### Installation method

Official Installer for macOS 13 and later

### Nextcloud Server version

AIO v13.2.1

### Nextcloud Desktop Client version

33.0.6

### Did this occur after an update or on a clean installation?

Minor version update (i.e. 33.0.0 → 33.0.1)

### Are you using the Nextcloud Server Encryption module?

No

### Are you using an external user-backend?

- [x] Default internal user-backend
- [ ] LDAP or Active Directory
- [ ] SSO - SAML
- [ ] Other

### Nextcloud Server logs

```shell

```

### Additional info

[NC Debug.zip](https://github.com/user-attachments/files/29332760/NC.Debug.zip)

Start by reproducing the macOS VFS transition described in the steps, then inspect the attached NC.Debug.zip for the account issue details. Compare the client state before and after switching between Standard Sync and VFS; done means the tray no longer reports issues for accessible accounts while syncing.

Written by the indexing model from the issue text.