[4.12.5] Crash while saving the level

Could you provide the project that is crashing? You can zip it up, upload it to Dropbox, and PM me a link on the forums: https://forums.unrealengine.com/member.php?160394-Sean-Flint

That way I can take a closer look at the setup, as I’ve been unable to reproduce it in a clean project on my end thus far.