Cell data disappearing Version: 6.0.2.1.0+

This is the Build ID: 6.0.2.1-2.fc28 that comes with Fedora. I am seeing cell A1 randomly disappear when I reopen a large spreadsheet. This started occurring when I upgraded from Fedora 26 - libreoffice-5.3.2.1-2.fc26 (I think). I share this spreadsheet with another computer and open it in 5.3-something there and don’t see this happening.

Anyone else seeing this kind of random thing?

Can it be a visualization issue?, going to the cell is their content showed on the Formula Bar?