Unable to Expand or Collapse Epics on Project Timeline

[Jacqueline Grace Padilla]

I recently lost the ability to expand and collapse epics on my project timeline to view the linked stories underneath. The only options currently available are to expand the column width or get a temporary preview of the hierarchy.

I can still see this functionality on some boards, but it appears to be unavailable or not configurable on others. Has there been a recent change to this feature, or is there a setting I may be missing? 

[Gor Greyan]

Hi @Jacqueline Grace Padilla

Welcome to the Atlassian Community!

You can see this post, where @Trudy P Claspill and @Arkadiusz Wroblewski introduced another article, where a similar experience arose.

https://community.atlassian.com/forums/Jira-questions/Timeline-not-grouping-child-items-to-Epics/qaq-p/3254332#M1184164