Each combination is generated by a unique URL, so it’s addressable. All you’re doing is going back to the previous address. No change in browser behaviour, or expected result.

@tobyhinloopn, @TheCraiggers, this was my idea, and I am uncomfortable that it completely hijacks the browser history. But I do like that I can use the back button to undo the change.

What would you prefer?

Well, at least one person did. I can't say I agree with them though.