Safari webextension cannot pick up cookies from Safari started by safaridriver

Hi, I am working on automation tests for Safari webextension. Currently if I install webextension and open Safari instance, then go to simple page that set cookies, webextension can pick it up.

In case I start tests using safaridriver, it opens Safari instance, opens simple page that set cookies, but when I click on webextension icon, then click "Stop session", I see webextension did not pick up cookies.

I am checking it on Safari 14.1.1 and macOS Big Sur. Same behavior I see on Safari Technology Preview.

Can someone help me with it? Link with WDIO project example - https://github.com/idem7x/safaribug.

Safari webextension cannot pick up cookies from Safari started by safaridriver
 
 
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