v2cache - files generation

Hi There
I recently found some strange behavior with the v2cache files relating to my videos.
They are created from scratch once I open the project, which is good behavior.
After closing and re-opening the project the files are generated once again from scratch.

Is this normal behavior?

My specs:
Cubase Pro 10.5 64-Bit, 16GB RAM

Thanks for any advice and kind regards,