user cant pick custom Jira dates in JIRA issue dates event in Team calendar when integrating with JIRA 8

Issue Summary

When the user has Confluence that integrates with JIRA 8, the user will not be able to add custom Jira dates from Jira in JIRA Event in the team calendar. Team calendar will only provide the option to create JIRA event via the project and with the standard 3 files (Issue Due Date, Version Due Date, Sprints)

Steps to Reproduce

1. Install JIRA 8
2. Create a custom field Test with definition Date Picker
3. Create Application link with JIRA 8
4. Create simple Jira issue macro to enable Oauth for your user.
5. Install Team Calendar
6. Add a JIRA issue date event
7. Select Project where the issue is with field Test

Expected Results

Field Test will be visible alongside with 3 standard fields Issue Due Date, Version Due Date, Sprints

Actual Results

Only standard 3 fields are visible (Issue Due Date, Version Due Date, Sprints)

Notes

This option worked in Jira 7.

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available