World sync failures between devices

I play on laptop and desktop. Things normally work fine but twice now I'd have the desktop complain that the world save is corrupt and can't be loaded.

On my desktop right now, when I "manage saves", it says the world save is corrupt. Yet the normal auto-synching with steam is not enough to fix this.

I'm seeing chatter than Iron Gate changed their save architecture along with the 1.0 rollout. Maybe there's a bug, or something that doesn't play nice with Steam's method of synching.

Anyone else seeing this? Or have ideas? I suppose I could run a server on the desktop and just have one world save with no synch required, but this is supposed to work without doing that.

EDIT: the timestamp on desktop's corrupt version is a few hours older than it should be, if it had downloaded the world properly. I'm looking into ways to tell steam to disregard that and re-acquire from cloud. I don't want to risk messing with the "restore backup" there because I definitely don't want the wrong world version to be seen as authoritative.

EDIT2 update: I still see the "corrupt" world save second on my list, but desktop now will load the proper world. Maybe the hotfix addressed this.