Paragraph bottom border overlaps the text

Hello,

I would like to fix the issue of paragraph border that overlaps the last lines of the text. I tried to fix that using a GREP style to the paragraph style. I googled an advice (Fixing Over-Extended Paragraph Borders in InDesign) and following it I created a character style which applies something like 150% vertical scaling to space character. I applied this character style with the GREP: ( )(?=\w+.~a) inside the paragraph style. The GREP works and scales the last space in the last line properly, but it did not help with my issue of overlaping the last line. After opening the files in the book everything looks fine:

As soon as I make changes (e.g. adding a new page or a line of text), the bottom border starts to overlap the text:

Any change made inside the bordered paragraph, e.g. insterting a new space ed deleting it helps to put the border at the right place. I try to do it each time the issue occurs. Unfortunately, I have over 30 places with this kind of border and it is hard to check all of them each time I want to export the book to PDF.

Please, could you give me any advice?