Yahoo webmail calendar not working

Description of the issue:
Yahoo webmail – calendar events – adding an email notification does not save the new notification. Works OK in FireFox but not Brave.

Steps to Reproduce (add as many as necessary): 1. 2. 3.
Go to mail.yahoo.com
Click on calendar
Add event with email notification and Save it
Click on event again and there will be no notification enabled. And notification won’t be working either so the save doesn’t work.

Actual Result (gifs and screenshots are welcome!):

Expected result:

Reproduces how often:
Every time a new calendar notification is set up
This happened fairly recently (last month or so perhaps?)

Operating System and Brave Version(See the About Brave page in the main menu):
Windows 10 – Version 1903 build 18362.418
Additional Information: