Invalid configuration written to SSH config file after a successful connection

[Jiia]

• Sequel Ace Version (including build number): 4.0.13 build 20062
• Sequel Ace Source (App Store/GitHub/Homebrew): Homebrew & App Store
• macOS Version: 13.5
• Processor Type (Intel/Apple): Intel

Is Issue Present in Latest Beta?

Not going to check

Description
When connecting to a database using default SSH agent Sequel Ace seems to write a new line to my ~/.ssh/config which breaks any subsequent use of the config file. The first connections succeeds, but subsequent connections fail because

OpenSSH_9.0p1, LibreSSL 3.3.6
debug1: Reading configuration data /Users/u/.ssh/config
debug1: /Users/u/.ssh/config line 1: Applying options for x.x.com
debug1: /Users/u/.ssh/config line 11: Applying options for *.x.com
debug1: /Users/u/.ssh/config line 32: Applying options for *
/Users/u/.ssh/config: line 41: Bad configuration option: x.x.com
/Users/u/.ssh/config: terminating, 1 bad configuration options
The SSH Tunnel has unexpectedly closed.

When I look at ~/.ssh/config I see that one new line has been added to the end of the file. Here's what the end of the file looks like afterwards.

Host *
  ConnectTimeout 10
  ExitOnForwardFailure yes
x.x.com ssh-ed25519 [long string]

The last line here is the new one that's appended.

Steps To Reproduce

1. Connect to a new database using SSH with configuration loaded from ~/.ssh/config
2. Connect to the database again

Expected Behaviour
Both connections work as expected

Related Issues

Additional Context

I tried this with both AppStore and Homebrew versions with the same issue. The permissions of the config file are 600.

Before connecting to the database, I'm promted that the authenticity of hots 'x.x.com' can't be established. This key is not known by any other names. This is expected, so I press 'yes'.

[Jason-Morcos]

I think you've selected your ssh config as your known hosts file.

Take a look in Sequel Ace's settings and make sure the known hosts file isn't set to your ssh config.