Freezing rows in spreadsheet locks top 30 rows

I want to freeze the top 3 rows of the spreadsheet. When I click save and re-open the spreadsheet, it opens up on line 30 of my spreadsheet, and the top 29 rows are inaccessible until I unfreeze the rows. Any ideas on how to resolve this?

Which version are you using on which operating system?
Have you already tried to open your file while being in Safe Mode?
Does this happen on all files (even new ones) or on specific files only ?

It happens on this specific file. We are using LibreOffice 6.3.0.4 on Windows 10.

Anyone have any ideas regarding this issue?