Whiteboard integration app - can a Talk's guest edit and draw?

I have the newest Nextcloud up and running on my host.
I have installed the Whiteboard integration app.
I have created a Whiteboard file (test-board.whiteboard) and shared it in the Talk’s conversation.
So far so good. All logged-in users can edit this file together, we can draw on the board in the same time.

But is there a way for a guest to join us and draw on the board?

I have checked “Allow editing” in the Details → Sharing tab of the file. But a guest cannot edit it and draw with others - he/she can only download the file.

Thanks for help!