Commit graph: adding/removing a branch drops the current changeset

• open a changeset with the commit graph (for example, https://extranet.atlassian.com/crucible/graph/FE-hg?csid=9d478038c14bbb88defc52be11b2fd1a5f2ee0b1)
• add or remove a branch (for example, 2.5)

--> the current changeset is dropped and the user loses where he/she was at