Hide and lock formula cells doesn't seem to work

Hide and lock formula cells doesn't seem to work

It has been a while since I have used Zoho, but I remember using the hide and lock formula cells in the past to protect cells in a document that I published.  Now when I try to use that option, it does not seem to work.  I can change/delete the cell contents in cells containing formulas.  This used to be my workaround for not being able to protect cells.

I'm pretty sure that I'm not missing anything on how to activate the option to hide and lock formula cells.  I just go to Publish and click on the box next to hide and lock formula cells.  But then when I go to my public document, I can edit and delete the content of formula cells.

Any help would be greatly appreciated.  Thank you.