<b>Chrome Version       : <Copy from: 'about:version'></b>
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL, along with the version, after other browsers where you
have tested this issue:
     Safari: OK
    Firefox: OK
       Edge: OK

What steps will reproduce the problem?
(1) Website which uses history.back() is put into iframe (no sandbox)
(2) Whenever the history.back() is invoked it doesn't do anything


What is the expected result?

 history.back() should show previous page of the website inside iframe

What happens instead?

 - nothing happens

Please provide any additional information below. Attach a screenshot if
possible.

it works when i opt out from "Site Isolation" using chrome://flags/#site-isolation-trial-opt-out