Steps to reproduce:
- Add a calendar to the page.
- Click Add Event button.
- Type in title and choose a start date, for example: 03/02/2018.
- Click Repeat checkbox.
- In the pop-up window, choose weekly of the repeat field, click Done.
- Change the start date to a day ahead, for example: 03/01/2018.
- Change the start date to two days later, for example: 03/03/2018..
- Change the start date back to the date that you choose in step 2, for example: 03/02/2018.
The event repeats once a week.
The event repeats three times a week.