What problem does this address?

When editing an "original" or "source" of a template part or synced pattern, the user is taken to an isolated editor.

Clicking the "back" button in the document header return the user back to the main page/template context, however the point of departure — where the user was in the block tree — is lost. The user returns to the top of the page.

What is your proposed solution?

As a user, I think it would be helpful to return the location of departure in the block tree, that is, the synced pattern or template part.

By that I mean, when returning to the main canvas, the block that was originally edited is selected and visible