Unless the OP can reliably create a set of steps and a .capx that can re-create this error, then posting as a bug report would be pointless.
I haven't come across such a thing as this before, and I seriously doubt it's a bug, or there would be thousands of reports by now.
We need more info, such as:
Are you saving locally, externally (USB for instance) or cloud?
C2 version?
Your OS?
Does this happen with every file you open?
Anything else you may think is valid would also help.