The application disabled the first box from "reminders" when create a second event and select the "Email" checkbox

REPRODUCIBILITY LEVEL:
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Always

STEPS:
====================
Steps
1.Open the Liferay APP with the ToDOs portlet.
2. Click on the + icon.
3.Create 1 new task.
Title: video test 1
Description: video test 1
Date: *Tomorrow
Check the “Add To Liferay Calendar” checkbox
Check the “Email” checkbox
Set 2 hours
4. Click on the submit button.
5. Create another task
Title: video test 2
Description: video test 2
Date: *Tomorrow
Check the “Add To Liferay Calendar” checkbox
Check the “Email” checkbox
 
Video of steps
https://www.screencast.com/t/hnFrCzd46J


CURRENT RESULT:
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The application display the box disabled when select the email checkbox

EXPECTED RESULT:
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The application display the box enable when select the email checkbox