I have lost all my epics from my plan, deleting the plan and starting again they are also missing.
If you are on server, go to your plan configuration and select issue sources from the menu on the left side of your screen. Click the big button to Edit issue sources and run through the import wizard again step by step.
In step 3/3 filter the issues by Epic and have a look if there are unchecked epics in the list. Check the boxes next to those again and complete the wizard.
This type of issues is always hard to diagnose without any insight into the actual data. Several things may cause your data to be hidden from sight (or from your plan altogether)
So, quite a few things to investigate!
Any bold statements I'd make would honestly be wild guesses without any insight into your configuration.
Adding a comment on your issues does trigger an update of the issue. So I wouldn't be surprised if somewhere in the back of your data set there is either some filtering on updated date or maybe an indexing problem in your Jira instance. In case of the latter, you could always reindex your Jira instance and see if that makes a difference.
Catch up with Atlassian Product Managers in our 2020 Demo Den round-up! From Advanced Roadmaps to Code in Jira to Next-Gen Workflows, check out the videos below to help up-level your work in the new ...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events