As noted by @nettrom_WMF
based on the description of homepage_pageview_token in the schema, I’d expect it to stay consistent so that it can correctly be joined with HomepageVisit/HomepageModule. In the events logged from Elena’s testing, the token set when active_interface=editsummary_dialog, action=close is different from the preceding action=editsummary_save
Confirmed by @Tgr
We reset the token at some point so that when the user clicks on the post-edit task suggestion, that's logged with a separate token. Due to the way we are setting up the postedit dialog, it's happening right before the save dialog is closed.