For completeness & record in case it helps anyone in future.
Problem caused by NT8 v15 Release. Prior to updating to .15 I was on v.26
I had already identified a problem (for me) with v.15 in that it ‘breaks’ virtual desktop coordinates in some cases (works with AutoIT, not AHK, vbs, Python)
Seems similar re: Landscape printing - I reverted to .26 to confirm issue doesn’t happen
v.15 re-installed - problem returned
After much c*cking around with the usual - Windows or manftrs printer drivers and the like, success.
I won’t try to describe how here, but simply put: NT’s changes to Chart windows in release 15 c/w .26 are likely ‘trigger’ along with Windows Update, Windows use of .ipp driver over manftr’s etc etc.
It isn’t exclusive to NT - there are similar issues reported/ranted about on the Brave web browser support site (and others)
No acknowledgement from Support, just an unintelligent Bot