"Could not save resource" and ghost resources issue

Couldn't find anything related, so here goes:

In the game I'm working on, I started experiencing an error where it pop ups a warning "could not save resource". I then proceed to close and reopen StencylWorks, only to find a random actor erased from my game. If I try to create a resource with the same name, it marks the name as already being used. I've lost 3 actors so far, but nothing I couldn't redo easily. Still, it's annoying, and some actor's will be a major pain to recreate if this bug happens with them.

I redownloaded a fresh build about 4 days ago, and I started experiencing this yesterday.

Are you using the official builds or the nightly?

Also, was the resource opened when you saved or closed?

Are you using the official builds or the nightly?

Also, was the resource opened when you saved or closed?

I think the nightly. I had opened the resources that vanished before trying to save. One was a newly created actor, and the other two I opened just to check the settings in some behaviors.

Fixed a different error that is very likely to be related to this one, so I'll cautiously say this is fixed now.  Thanks for reporting this one!

This isn't fixed, I know exactly what is causing it.  Save a resource BEFORE closing it to avoid this for now while I think of a way to handle this.

Edit: Fully fixed in newest nightly.