Thank you for watching, voting, and commenting on this issue.
Running multiple sprints in parallel from a single backlog is something we will bring to team-managed projects soon. However, we have some other priorities ahead of it - including time estimation and improved filtering. It's not possible to give a date, but I expect we will start to work on this in the coming months.
In the short term, we recommend teams use company-managed projects when they need to run parallel sprints. We apologise for the inconvenience this may cause you.
Please continue to vote, and in particular, please continue to add comments on how your teams find value when running multiple sprints in parallel from a single backlog. This contextual information of what you are doing and why you are doing it is invaluable for providing you with a product that fits your needs.