Dear support-team,
i´m checking out JIRA v. 7.12.0 with Confluence v. 6.11.0 in our test-environment.
The JIRA health check report always an application link error.

The only application-link that we have is the connection to confluence and this is working fine.
Application-link from Confluence to JIRA

Application-link from Confluence to JIRA

A new created link from an jira-issue to a confluence-page is working fine. Already exists links are also working fine.
I think the problem that u can found here https://jira.atlassian.com/browse/JRASERVER-65610 is similar. But I like to report the problem again, because the status of the link obove is already "resolved".
Kind Regards
KNL