I have a similar problem.
When I change the names of Epics through the Roadmap section, in the Backlog section, the Epic doesn't reflect the change in the Epic name. The only way I have found to fix this bug is to manually copy and paste the Epic name from the Roadmap section to update the name. Still, there is a problem, when I change the name of the Epic manually in the Backlog section, there is a maximum number of characters that I can add to the name, which does not happen in the Roadmap section and don't allow me to have the same Epic name in both sides (the Roadmap and Backlog).
PS: I tried refreshing the webpage but not work.
How can I fix this?