I am using PGAdmin 4, the application, on Ubuntu 20.04.1 (Zorin 16). I am using an SSH tunnel and an identity file. This works. However every time I connect, I am prompted for a password for the identity file. The file is not password protected, other than filemode of 600. There does not seem to be any issue with not supplying the password, but is it supposed to be the password of the remote SSH login, or the password of my current user for "su" purposes? Or is it just a glitch?

Inspecting the properties, the buttons (and these are of a fat pair radio buttons in lieu of a checkbox) are not persistently remembering my choice to use a private key.