Observed in LO 6.2 running on macOS Mojave:
- Create new a Text Document in Writer
- Format Page… to: Width 11,00 cm, Height 22,00 cm
- enter some text in the new created document
- File → Print… dialog shows an A4 formatted page with lots of white space on the right side
- When trying to print, the document is sent to printer in A4 format
The Same issue occurs within the the envelope assistant (Insert/Envelope…). When 11,00 x 22,00cm is selected, the output sent to the printer is an A4 page instead.
Fun fact: Microsoft Word shows- and prints the page dimensions of the .odt file from LO correctly.