System Information
Operating system: Win 10 21H2
Graphics card: GTX 1070 - Studiodriver V. 472.39
Blender Version
Broken: Blender 3.1.0 - Alpha December 31, 02:07:49 - bf4358ed0c54
In this example I have extreme motion blur settings for a particle animation.
However, it also happens in other scenes with normal motion blur settings that individual images are rendered without motion blur or shattered.
Blend:
Eevee:
Cycles: