"Widow/Orphan Line" box doesn't accept "zero" as a value
This is a newbie question. My Framemaker version is 2020. Whenever I insert a page break at the end of my pages the next page always starts with an empty line. When I try deleting that empty line by backspacing then the page break gets removed and the next section gets merged into the former page. I did some research in the community and my impression was that I needed to let zero "Widow/Orphan Lines" to be created for pagination. The strange thing is that whenever I enter "0" into this box and press Enter (or update my style) then the value does automatically change to "1" and all of my page breaks get invalidated and removed. I also select "Remove Overrides" when Framemaker warns me about some paragraphs using format overrides during the paragraph style update process. I'm not breaking the pages at tables or graphics. I'm simply ending sections or sub-sections and continuing to another section or sub-section on the next page. I always end these sections/sub-sections in the "Body" paragraph style to acquire a clear "page break" definition.
Maybe my entire page layout has some basic formatting problems but I couldn't find any clues by checking them which could cause this behaviour.

