Comment 1 for bug 1940637

Is this happening if you also just 'juju remove-machine' without '--force' ?
What is the underlying error state, is the issue that the machine never came up, or it did come up but then ended up hanging after a while with an error.
Certainly we shouldn't be leaking security groups as a general case. And we should be trying to clean them up even with '--force'. It does mean that if we fail to clean them up, likely '--force' will still progress the removal of the rest of the machine information because you asked us to.

However, if any 'juju remove-machine' leaks a security group, that is definitely something we should be fixing. I also wonder if 'force' makes us progress faster, and that leaves us hitting something like "cannot remove security group because it is still in use".