Word tables previously stable move rows onto new pages

[GarryGS]

I have an Office 365 Word (vsn 2501) doc with many tables in it. At the time i made the doc, some months ago, I very carefully set the tables up (margins, padding, etc, etc) to precisely fit on the pages. For most, I ensured that there was generous space top and bottom. But some of them were tight fits. Yet all was well during the editing process. A pdf I made from the doc was just fine.


Now, months later, I open up the same doc to continue editing. All the tables that were tight fits have decided to spill over rows to the next page. I have changed nothing about the doc. The page size, table properties, etc are exactly as I created them.


My questions to you, Word sages, are:
1. Why has this happened?
2. Is there a easy way to rectify it, without redesigning all the tight-fit tables?


Thank you for your time,


Garry