Confirmed as bug by Asana support:
Thanks for your response and for providing this helpful video recording.
I’ve confirmed that this issue has already been escalated to our Development team, but it may take some time to get fixed.
My apologies for any hassle this may have caused you. We’d like to inform you that this might take a few months to get resolved.
I will be closing this case for now, but once we have an update, we’ll make sure to inform you.
Please don’t hesitate to let me know if you have any questions. We are always here for you.