ddev: Can't access more than 2 ddev sites at the same time (after updating to v1.16.0, MacOS)

Describe the bug After updating to the latest version 1.16.0 on macOS I find that I can’t browse to any site for any ddev project I start after the first started project.

To Reproduce Steps to reproduce the behavior:

ddev start site1 open browser with this site: https://site1.ddev.site. (all good)

then start new a project: ddev start site2

browse to site2: https://site2.ddev.site. I get this error:

503: No ddev back-end site available. This is the ddev-router container: There is no back-end webserver at the URL you specified. You may want to use “ddev start” to start the site.

Expected behavior I expect the new site to open in the browser

Screenshots If applicable, add screenshots to help explain your problem.

Version and configuration information (please complete the following information):

• Host computer OS and Version: macOS Catalina 10.15.7
• Docker Desktop version: 2.5.0.1 (49550)
• ddev version information (use ddev version)

DDEV-Local version v1.16.0 commit COMMIT should be overridden db drud/ddev-dbserver-mariadb-10.2:v1.16.0 dba phpmyadmin:5 ddev-ssh-agent drud/ddev-ssh-agent:v1.16.0 docker 19.03.13 docker-compose 1.27.4 os darwin router drud/ddev-router:v1.16.0 web drud/ddev-webserver:v1.16.0