Map not saving when it says it saved

[RedEagle_P1. 905]

Editor maps sometimes say "Saved" but do not save at all. 

[leo_chaos 23]

I've had this too, editor seems to save occasionally as as some point it kept some changes I made, but I've tried repairing the floor on my explore mode a few times in editor, saving a couple of times manually and saving on exit, reopen it to find it how it was before I started again. Using save as prongs up the prompt for a new title and says saving but doesn't actually make a save either