Trying to reload asset from disk error

We've been working with unity for some time and we use asset-bundles for our content, recently we noticed this log on unity repeating itself a lot:

Trying to reload asset from disk that is not stored on disk

(Filename: ....\Runtime\Serialize\PersistentManager.cpp Line: 996)

Trying to reload asset from disk that is not stored on disk

(Filename: ....\Runtime\Serialize\PersistentManager.cpp Line: 996)

Trying to reload asset from disk that is not stored on disk

(Filename: ....\Runtime\Serialize\PersistentManager.cpp Line: 996)

when this happen it is common that the game ends up crashing, but it doesn't happen all the time, so it's hard to know what's happening

What this message mean? could this be the cause of some crashs??

This has a bug smell all over it. Can you reproduce it? If so, we'd love to take a look at it if you can submit it using Menu->Help->Report a problem. Thanks.