in previous version formatting a DL envelope page as width 22cm height 11cm and landscape orientation and then putting the short side into the printer as indication on the print preview, correctly printed the envelope, since updating from Ubuntu 16.04 to 18.04.2, the print instruction still shows putting the short side into the printer but now the printing appears as if the long side had been put in. Putting the long side in first, the print is cut off at the 11cm width. How can I correct this.
And where do you think is the relation to LibreOffice? From your description I take the fact, that the change in the behavior is realated to the move from Ubuntu 16.04 → 18.04. This sounds for me like a question for Ubuntu guys.
The previous version of Ubuntu had LibreOffice 5.1.6.2. Note that the Print preview now also shows the text incorrectly aligned on the envelope.
Could you upload an example file ?