On Brave browser (MacOS), sync icon stucks on syncing

### Which version of floccus are you using?

5.8.6

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

600

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

No

### Sync method

WebDAV

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

Brave Browser MacOS

### 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)

Rclone WebDAV

### Describe the Bug

When Floccus tries to sync automatically following the Synchronization interval, the icon stays in syncing mode (see image) until I click on it. It seems like it's stuck.
This never happens on manual syncing.

### Expected Behavior

The cloud with the circle icon should stay in the "syncing" stage for a few seconds and then it should display the cloud with the tick icon which means that it was synced.

### To Reproduce

Setup Floccus on Chrome or Brave browser, wait for it to sync automatically and when the syncing starts it never finishes until you click on it.

### Debug log provided

- [ ] I have provided a debug log file