It is new function at Privileged Access Manager ( a.k.a PAM) 4.0.3, "Show SSH Certificate Options" button in Password View Policy (PVP) panel.
And then some option disabled since it is not work as the behavior.
But after "Exclusive Check-out On Auto Connect" is checked on and off, some options are enabled and it can be selected.
Why does it occur?
Release : 4.0.3
Component : PRIVILEGED ACCESS MANAGEMENT
As new function, SSH Certificate at login process does not have password information.
So, some option in PVP are ignore as the process.
And then if it check on, it does not affect the login authtication process.
But this behavior is not correct.
This is known problem in internal. It will fix in next release, 4.1.1 or 4.0.4.