We are using Confluence Data Center 8.5.3 . The problem is related to Jira Issues Macro.
There are several option to add issue to your confluence page. There are "Search" and "Recently Viewed" options.
When we try adding a issue with search we can see the issues but the insert button is not working.
However when we try with recently viewed option we can select any of recently viewed issues and able to insert it.
We have no idea about why we had this issue. Does anyone have a solution to how to overcome the problem?