Connection doesn't respect/load project config

[codebude]

Describe the bug
The Connection class ignores the ssh_config_path from project-level fabric.yml-file. The config is loaded to context correctly, but Connection does not pick it up.

To Reproduce
We have a fabric.yml at project/task level that contains ssh_config_path: resources/config and we have a task defined as:

from fabric import Connection
from invoke import task

@task
def say_hello(ctx):
    with Connection("my-server.de") as cxn:
        cxn.run(f"echo Hello world!")

The ssh-config at resources/config looks like:

Host my-server.de
    User root
    IdentityFile ~/.ssh/operator.key

Expected behaviour
We expect fabric/Connection to logon as root with the given key file. Instead we get:

File "/mnt/c/Users/codebude/Documents/Git/fabric/.venv/lib/python3.11/site-packages/paramiko/transport.py", line 1640, in auth_publickey
    return self.auth_handler.wait_for_response(my_event)

If we pass the config from context explicitly to the Connection constructor the connection works fine:

from fabric import Connection
from invoke import task

@task
def say_hello(ctx):
    with Connection("my-server.de", config=ctx.config) as cxn:
        cxn.run(f"echo Hello world!")

Alternative, if we set ssh_config_path: resources/config in the ~/.fabric.yml file in our home directory it also works. It's only broken, if we define it in the fabric.yml file that lays besides the fabfile.py.

Environment

• Python 3.11.3
• Fabric 3.0.1
• Paramiko 3.1.0
• Invoke 2.1.1
• Client-OS: Windows 11
• Target OS: Ubuntu 20.04