We are unable to see Jira issue links panel when any of the issue fields (eg. priority, labels) are modified inline. The issue occurs only when the location of the Issue matrix field is changed to the screen field panel. Also, the issue is seen after upgrading Jira from 7.11.2 to 8.5.5 and app version 3.8.8.
Please see the screenshots of the issue matrix configuration below.
Please see the attached gif of the issue.
This bug has been fixed in Issue Matrix 3.3.9 which is now available on the Atlassian Marketplace.