unable to print #10 envelope in LibreOffice 5

I can print a 6 3/4 envelope just fine but not #10 Obviously, I can’t put a #10 envelope crosswise in my printer tray. LibreOffice Ver. 5 has a problem that did not exist in LibreOffice ver.4. When printing a #10 envelope, it always tries to format as a C5 envelope instead of a #10 envelope. I have to choose the wrong envelope orientation (crossways) instead of endways. Then, LibreOffice ver. 5 will print a #10 envelope endways but with the sender address too far right. As I stated, this was not a problem in LibreOffice ver. 4.