NextCloud Windows Client 34 unreasonably slow - reinstalled 4.0.6

### ⚠️ 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

I had an automatic update from 4.0.x to 34.0.1 on W11. Before the update everything went very well, smooth updates and syncs. Since then I have to wait for hours before anything happens.
Reinstalled 4.0.6 and everything was OK again. Deselected "check for updates". This version wil suffice for me until I have the time to switch back to something like Owncloud.
Please don't issue any new version if it doesn't function properly. Anyway, I didn't need a new version.

### Steps to reproduce

1. Right click on the file
2. Click on Share Options
3. The share dialog does not display the option to share by e-mail
...

### Expected behavior

When clicking on the share dialog, share by e-mail should be an option.
...

### Which files are affected by this bug

*.*

### Operating system

Windows

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

W11

### Installation method

Official Windows MSI

### Nextcloud Server version

31.0.7

### Nextcloud Desktop Client version

34.0.1

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

Major version update (i.e. 4.0.0 → 33.0.0)

### 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

_No response_