System variable value not shown (or blank or empty) in Replacement Message

Hello!

I've only slightly modified Replacement Message "post_admin-disclaimer-text" but kept out-of-box system variables. However, as per screenshot, variable values aren't being substituted (or are empty valued)... Is this a fault, or am I'm doing it wrong?

FG200F-1 (global) # show system global | grep post-login-banner     set post-login-banner enable  FG200F-1 (global) # show system replacemsg admin post_admin-disclaimer-text config system replacemsg admin "post_admin-disclaimer-text"     set buffer "Unauthorised Access Prohibited.  %%LAST_SUCCESSFUL_LOGIN%%; %%LAST_FAILED_LOGIN%%" end

c:\Temp} ssh -l username FG200F-1 username@FG200F-1's password:  Unauthorised Access Prohibited.  ;   (Press 'a' to accept):  FG200F-1 # exit Connection to FG200F-1 closed.

Also.. How to include line breaks?