Add event button have issue and click calendar field can't edit event if it has not been saved.

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP SP2, 7.0.X EE, Master
• Fix Version/s: 6.2.X EE, 7.0.0 DXP FP14, 7.0.0 DXP SP3, 7.0.3 CE GA4, 7.0.X EE, 7.1.X, Master
• Component/s: Calendar
• Labels:
  • QA-NA
  • fw_code_review
  • fw_test_needed
  • liferay-digital-enterprise-70-sp3
  • liferay-fixpack-de-14-7010
• Branch Version/s:
  7.0.x, 6.2.x
• Backported to Branch:
  Committed
• Fix Priority: 5
• Sprint: Workflow #07 - April 10 - 21
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/48400

Issue specific to Tomcat 8.5

Steps to reproduce:

1. Login with admin.
2. Add a calendar portlet to page.
3. Click calendar field and Click edit.
4. Close popup.
5. Click Add Event Button.

Expected behavior:
User can add event without issues.

Actual behavior:
Step3 and step5 appeared same issue.

Note:
I will attach a .gif file to explain my steps.