SSH key is not used when connecting to Pantheon

Hello, I'm using https://pantheon.io/ to host websites. Their git repositories have following format:
ssh://codeserver.dev.SITEID@codeserver.dev.SITEID.drush.in:2222/~/repository.git

The 1Password asks permission to use correct key, but then fails with following error:

1Password Version: 8.8.0
Extension Version: Not Provided
OS Version: macOS 12.4
Browser:_ Terminal
Referrer: forum-search:https://1password.community/search?Search=pantheon