Editor losing state on tab navigation

Steps to reproduce:
1 - edit the template of any page
2 - click Save
3 - click on Revisions tab
4 - click on Page tab

It should display the latest template that you just edited but it does display the previous state (without the recent changes).

No file, test, or entry point is identified. Start by reproducing the four navigation steps in the editor, then trace how the saved template state is loaded when moving from Revisions back to Page. Done means returning to Page displays the latest saved template rather than the previous state.

Written by the indexing model from the issue text.