[Bug]: Upgrading to Tabster v4 makes v8 Dialog trap focus break when mixed with v9 Dialogs

Library

React Components / v9 (@fluentui/react-components)

System Info

n/a

Are you reporting Accessibility issue?

None

Reproduction

Open sandbox
Note that input/button focus zone works as expected, and that v9 works as expected. Open v8 and note that focus does not stay inside the dialog when tabbing forward (it does going backwards).

Remove the v9 control from the page, and the v8 dialog works again.

https://codesandbox.io/s/v8-modals-rendered-with-v9-tabster-4-based-controls-ly6sj9

Bug Description

Before upgrading to Tabster 4, focus would stay trapped in v8 Dialogs

After upgrading to Tabster 4, focus escapes v8 Dialogs and moves to browser chrome, even though v8 dialogs don't use Tabster. This does not appear to affect regular FocusTrapZones (as demo'ed in sandbox)

Logs

No response

Requested priority

Blocking

Products/sites affected

loop

Are you willing to submit a PR to fix?

no

Validations

• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.