I agree, this issue is a big deal that caused me to try another plugin.
Perhaps one solution would be to destroy the old sessions instead of preventing the new one? That’s the way many other websites do it like Spotify, for example.
Thanks for the comment, and I hope it gets added to plugin in future.
It sounds like you got this working. Could you explain how to use the wp_bouncer_redirect_url filter? I don’t see any directions anywhere.