Using or not using a running head does not affect this issue.
BF does not clearly state this principle (which we are in the process of fixing). The answer is Yes. If something ends on line 24 or 25 of a braille page that requires a blank line following it, that blank line would appear at the top of the next braille page.
In Example 1 above, the body paragraph would begin on line 2 if no running head is used and on line 3 if a running head is used.