tabs to have separate history

Like a web browser, I would expect a tab's page history to be self-contained.

Say we have 2 tabs, tab A is on page A1 and tab B is on B1. I navigate tab A to page A2, then visit tab B, then return to tab A without doing anything to that page. If I am to press back in tab A.

Expected: Return from page A2 to page A1. So I have 2 tabs (A1, B1).

Actual: Return from page A2 to page B1, resulting in 2 tabs (B1, B1) 😱