I’ve noticed that when reimported an FBX containing multiple AnimSequences after making adjustments to previously imported animation only the newest imported animation is being marked as unsaved. I didn’t think much about only having one being marked as unsaved since I only made edits to the newest animation but when I altered a older animation I was shocked to see that my changes were undone the next time I opened UE4. It wasn’t really a big deal I just reimported the animation and manually saved the AnimSequence I changed.
since all I was doing before was hitting save all I hadn’t really noticed this until a while ago. Heck I wasn’t even sure if it was a bug until I noticed something fishy was going on. Since I was making tiny changes such as moving the feet on an animation up a tiny bit so they don’t stick through the floor, I hadn’t noticed anything was wrong.