I have 2 different sites I’m in development on and noticed the same issue randomly on both. On both I had bloqs that amongst the field in the bloq were a Simple Grids field. I had populated some pages with the bloq containing the grid field. Some time later I noticed that the data I had put into the grid was gone. All of the row data was gone and it was as if no data had ever been entered. The other fields in the bloq still had all their data. It was just the grid field that was empty. I noticed this happen on both sites. Unfortunately I don’t have any steps to reproduce. Both sites were in active development, so content was being entered and new bloqs were being defined and even existing bloqs being modified. Not sure if you have heard of this happening or have any ideas what might have caused it.