Custom size print jobs are shrinking graphics on one half of page
I print all custom paper sizes, and since getting my new computer with MacOS Ventura, we found out that all of our print jobs on oversized pages (12.5x19" in most recent case) the print is shrinking on only one half of the page. So, for example, this sheet has four-up 5.875" squares and when you measure the crop marks on the right side of the page they are 5.75", but the top half is printing to scale.
Things I have tried:
Printing from Preview
Printing from Acrobat
Printing from Adobe Illustrator
Installing the latest Print Driver (OKI C942dn)
Making sure all software updates have been run
Creating a new custom page size before printing
None of these have helped. Any ideas?
Mac Studio