Bitwarden extension opens a new tab in another container after update

[Heracraft]

Current version: 1.21.1b

After a recent update of zen, the use SSO login button in the bitwarden extension now opens the resulting tab in a container other than the current container: the first (default?) container tab. This is a change in behavior. What I expect is the resulting tab will be opened under the current container tab.

Now, I noticed this change after an update to zen but it also could be because of an update to the extension itself.

Could someone lead me in the right direction? Is this a documented change in Zen? is this something to do with how bitwarden handles opening new tabs under the hood?