Hi @Gekkosera, could you please share with us where are you saving your files (the location/folder)? Is it a folder in your disk? is it OneDrive, Dropbox, or cloud-like folder? what specific version of Windows are you using?
In the past there were several problems with files saved with sequences of bytes equal to zero (File full of null bytes / zero bytes / zero filled), but I don’t know if that was a specific Windows bug that was already fixed (or a specific Windows bug that some times happens for some reason).
As far as I remember, this bug was always a Windows thing (wasn’t reported on Linux or macOS before).