Updates change my spreadsheet row sizes

This is the right place.  I suggest you record
the width of your columns now, and then again
after the next update to confirm they are changing
in width.

Mike

Hi. Is this just on screen or printing also.
I suggest you make sure you are using a system font not supplied with Libreoffice so that will be constant, record row height and right click a cell, Format Cells..>Boarders and record padding.

And see if any of these change next time