XnView Software

Viewing folder with 200 raw files, set 100% zoom fullscreen lock zoom.
After viewing about 30 files, the next file loads '100%' but size about600x800.
Enlarging it shows pixelated. Going forward all files are small. Back files are fine.
Restart xnview and all fine again.

And if you try to load directly this picture, perhaps it's the embedded jpeg