Oh thats a great content, thank you so much but i think i am soo dumb to solve. I am trying for 30mins every possible combinations but i didnt understand where to put f or b and which page break icon to get into the field, previous one or next one. So i tried all combinations like only f only b, b and f together etc etc but still line is not disappearing at all :/

Is it because i have text-merge field-text, is that mixing the mentioned logic on the guide?