A spurious event is created when a edition is made in the first instance of a recurring event and is chosen to be applied to the following ones.
1. Create a recurring event
2. Drag and drop the first instance of the event to the following day
3. In the dialog, choose "All the following instances"
- All the instances will have its time changed
- All the instances have its time changed but a new event appears in the time of the original instance.
See the GIF below: