Same new behavior with recent patch. Running windows 10. Was seeing vpnkit.exe was using 4.1G when I noticed it. It’s never grown like that. I have one container with nginx and its idle. I can stop the container and still watch the memory grow at a steady pace.
Also running 18.03.0-ce-win59 (16762).
Bouncing the docker service was the only way I can see to recover memory.