Hey, this is a known regression. Cmd+E resets the sidebar position to the left, even if you set it to the right. The team is aware of the issue.
The same bug is reported here: Toggle agent layout ignore sidebar location if set to right
Unfortunately, there’s no working workaround yet. The workbench.sideBar.location: right setting in settings.json doesn’t help either, since Cmd+E overwrites it directly.
Let me know if you have any other questions.