"Unable to connect" via ssh

[all3vil]

Apologies in advance if this isn't the right place to bring this up, but I'm out of ideas without help.

oxs dies with unable to connect but I can't figure out why. Both oxidized and ssh directly both work. My hunch is that it's a Kex (or similar ssh option) mismatch with the switch's ssh offer because I had to add in the necessary options in the oxidized config to make oxidized work, and also the local machine's /etc/ssh/ssh_config in order to make the standard ssh client work. But maybe oxidized-script is ignoring those options? Packet capture confirms it is exchanging a couple ssh packets with the switch, and debugs on the switch just say the client is terminating the session.

I don't really have reason to think this is necessarily a bug or anything, but I'm out of ideas on what to knobs to twiddle and I don't know how to get any more detailed debug out of it as to why it's failing. Any pointers?

Sanitized debug output:

oxidized@librenms:~$ oxs -d X.X.X.X "sh ver"
I, [2023-07-19T13:44:36.917855 #4193427]  INFO -- : lib/oxidized/nodes.rb: Loading nodes
D, [2023-07-19T13:44:36.918009 #4193427] DEBUG -- : resolving DNS for X.X.X.X...
D, [2023-07-19T13:44:36.918033 #4193427] DEBUG -- : IPADDR 
D, [2023-07-19T13:44:36.918087 #4193427] DEBUG -- : node.rb: resolving node key 'model', with passed global value of '' and node value 'ios'
D, [2023-07-19T13:44:36.918104 #4193427] DEBUG -- : node.rb: setting node key 'model' to value 'cisco' from global
D, [2023-07-19T13:44:36.918125 #4193427] DEBUG -- : node.rb: returning node key 'model' with value 'ios'
D, [2023-07-19T13:44:36.918138 #4193427] DEBUG -- : lib/oxidized/node.rb: Loading model "ios"
D, [2023-07-19T13:44:36.919016 #4193427] DEBUG -- : lib/oxidized/model/model.rb Added all to the commands list
D, [2023-07-19T13:44:36.919049 #4193427] DEBUG -- : lib/oxidized/model/model.rb Added secret to the commands list
D, [2023-07-19T13:44:36.919065 #4193427] DEBUG -- : lib/oxidized/model/model.rb Added show version to the commands list
D, [2023-07-19T13:44:36.919095 #4193427] DEBUG -- : lib/oxidized/model/model.rb Added show vtp status to the commands list
D, [2023-07-19T13:44:36.919106 #4193427] DEBUG -- : lib/oxidized/model/model.rb Added show inventory to the commands list
D, [2023-07-19T13:44:36.919116 #4193427] DEBUG -- : lib/oxidized/model/model.rb Added show running-config to the commands list
D, [2023-07-19T13:44:36.919235 #4193427] DEBUG -- : node.rb: resolving node key 'input', with passed global value of 'ssh' and node value ''
D, [2023-07-19T13:44:36.919256 #4193427] DEBUG -- : node.rb: returning node key 'input' with value 'ssh'
D, [2023-07-19T13:44:36.968856 #4193427] DEBUG -- : node.rb: resolving node key 'output', with passed global value of 'git' and node value ''
D, [2023-07-19T13:44:36.968925 #4193427] DEBUG -- : node.rb: returning node key 'output' with value 'git'
D, [2023-07-19T13:44:36.978135 #4193427] DEBUG -- : node.rb: resolving node key 'username', with passed global value of '' and node value ''
D, [2023-07-19T13:44:36.978178 #4193427] DEBUG -- : node.rb: setting node key 'username' to value 'MyUser' from global
D, [2023-07-19T13:44:36.978199 #4193427] DEBUG -- : node.rb: returning node key 'username' with value 'MyUser'
D, [2023-07-19T13:44:36.978208 #4193427] DEBUG -- : node.rb: resolving node key 'password', with passed global value of '' and node value ''
D, [2023-07-19T13:44:36.978219 #4193427] DEBUG -- : node.rb: setting node key 'password' to value 'MyPassword' from global
D, [2023-07-19T13:44:36.978232 #4193427] DEBUG -- : node.rb: returning node key 'password' with value 'MyPassword'
I, [2023-07-19T13:44:36.978331 #4193427]  INFO -- : lib/oxidized/nodes.rb: Loaded 1 nodes
D, [2023-07-19T13:44:36.978373 #4193427] DEBUG -- : lib/oxidized/input/ssh.rb: Connecting to X.X.X.X
D, [2023-07-19T13:44:36.978424 #4193427] DEBUG -- : AUTH METHODS::["password"]
unable to connect
/var/lib/gems/3.0.0/gems/oxidized-script-0.6.0/lib/oxidized/script/script.rb:113:in `connect': unable to connect (Oxidized::Script::NoConnection)
	from /var/lib/gems/3.0.0/gems/oxidized-script-0.6.0/lib/oxidized/script/script.rb:92:in `initialize'
	from /var/lib/gems/3.0.0/gems/oxidized-script-0.6.0/lib/oxidized/script/cli.rb:122:in `new'
	from /var/lib/gems/3.0.0/gems/oxidized-script-0.6.0/lib/oxidized/script/cli.rb:122:in `connect'
	from /var/lib/gems/3.0.0/gems/oxidized-script-0.6.0/lib/oxidized/script/cli.rb:37:in `run'
	from /var/lib/gems/3.0.0/gems/oxidized-script-0.6.0/bin/oxs:5:in `<top (required)>'
	from /usr/local/bin/oxs:25:in `load'
	from /usr/local/bin/oxs:25:in `<main>'
oxidized@librenms:~$