Could you provide some example of how to reproduce this problem, or show us the <web-panel> descriptors in your atlassian-plugin.xml plugin descriptor?
Is servicedesk.project.sidebar a valid location?? Further, I am fairly certain that the project sidebar or project panel cannot extend AbstractJiraContextProvider and instead you need to implement Condition.
Please, try to set your location as “servicedesk.project.sidebar.navigation.secondary”. I found it using the Web Fragment Finder, however it’s not working well with Jira Service Desk.
Did anyone find any Development Guide to work with Jira Service Desk Plugins?