The Timeline view in Jira projects used to show Epics, which you could expand to see all stories within those epics.
Since today it seems that this has changed:
- it's also showing all stories that aren't assigned to any epic
- but more importantly: It's also showing my initiatives and themes that we are using in our Jira plans.
- What this means is that I can't sort epics anymore independently from the initiatives they have been assigned to
- When hiding the initiatives and themes via quick filter, only stories are shown (without the epic hierarchy) and with this new icon:

Question: how can I get it back to how it was before?