Just updated to this commit: c4e07a8
The last time I updated roots was the end of December.
I access the install through a reverse proxy on a different domain so having the relative URLs is critical. Clicking the filters or next page links breaks the session.
were you able to figure anything else out? does disabling root relative urls in lib/config.php fix it?
again, nothing in wp-admin should have ever been affected but this might be relevant: a8c5437