I am using IPAM in the Engineer's Toolset (v. 10.6) and I am trying to get the auto publish to work. Even I stay logged in with the application running, it doesn't auto publish.
It will publish fine if I tell it to, and all subnets are set to be included in the publish.
We have not been able to reproduce this issue. Do you have rights to the auto-publish location? Try changing it to another folder.