`.owncloudsync.log` in every sync folder (hide?)

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### Expected behaviour
Either that file should be hidden or not exist.

### Actual behaviour
Tell us what happens instead
.owncloudsync.log Shows up in every sync folder from multiple servers.

### Steps to reproduce
1. Install Nextcloud Desktop 3.1.1
2. Sync a Folder
3. .owncloudsync.log shows up in Sync Folder
4. Delete .owncloudsync.log
5. Restart Nextcloud and it comes back.

### Client configuration
Client version:

Operating system: Windows 10 - 2004

OS language: English

Qt version used by client package (Linux only, see also Settings dialog):

Client package (From Nextcloud or distro) (Linux only):

Installation path of client:

### Server configuration

Nextcloud version:

Storage backend (external storage):

### Logs

Please use Gist (https://gist.github.com/) or a similar code paster for longer
logs.

1. Client logfile:

Output of `nextcloud --logdebug --logwindow` or `nextcloud --logdebug --logfile log.txt`
(On Windows using `cmd.exe`, you might need to first `cd` into the Nextcloud directory)
(See also https://docs.nextcloud.com/desktop/2.3/troubleshooting.html#log-files)

2. Web server error log:

3. Server logfile: nextcloud log (data/nextcloud.log):