Yeah, that's happening to me, too. I'll be able to fix the problem but after saving, closing, and reopening the file, the issue reappears. Boo! I've sent my project files to Sketch and they're looking into it. Hopefully they'll get a fix out soon.

Two issues I'm running into with Sketch 49…

1) Some nested layers with shadows (from a Library) aren't appearing properly. The shadows just don't show up.

2) Some override-able layers no longer have overrides available (they just say "none")—namely layers with shadows and layers with 0% fill.

Didn't have these issues with 48.2. Any ideas? Otherwise I'm excited about this new release.