Does Collaborate dramatically increase scene file sizes?

My file sizes for my scenes have gone from tiny (40kb) to 10-20 mb which is now the largest things in my standalone build.

The only thing significant that I have done today is try out Collaborate for the first time.

Does anyone know what is going on?

If this isn't collaborates doing, do you have any idea why else this would have happened when I have not changed my scenes?

 

I use collaborate and haven't seen that happen, so I'm betting it's something else?

Did you change anything else? Anything at all?

 

I have no idea, I didn't do anything that would cause this. Maybe its just a new bug with Unity?

I found a workaround. Making any change to the scene whatsoever and then resaving each scene is making them go back to normal sizes. so strange.

edit: it worked for every scene except for my main menu, it remains at 19mb, (it was 4mb before). The scenes that are "fixed" are now 70-80 kb, instead of 40-50kb that they were before, fine now but still doesn't make any sense. Something definitely very buggy going on.

 

I found out what caused the file size, I have somehow lost all of the prefab connection in the scene. After clicking on the prefabs and clicking revert to turn it back into a prefab the file size goes back down.

With that said, I am unsure of what caused the loss of all the prefab connections in the first place. Is it possible that collaborate got rid of the prefab connections for prefabs that have unapplied changes in scene?