Issue Freezing/Unfreezing Instrument Track

This is borderline issue and feature request.

If I open a project and unfreeze an instrument track to check something out, I would like to be able to close the project without saving and the project would remember the frozen state of the track. When I try this and open the project again, it can’t find the cache file for the frozen instrument. See attachment.

Any procedure that will avoid this error without needing to freeze the track again and save the project?

Freeze Error.jpg

Sounds like a bug caused by Cubase deleting the rendered file when when you unfreeze.