Fix inventory mode 2 undo

core/src/main/java/com/boydti/fawe/object/changeset/BlockBagChangeSet.java

@@ -77,6 +77,7 @@ public class BlockBagChangeSet extends AbstractDelegateChangeSet {
     @Override
     public void add(int x, int y, int z, BaseBlock from, BaseBlock to) {
         check(from.getCombined(), to.getCombined());
+        super.add(x, y, z, from, to);
     }
 
     public void check(int combinedFrom, int combinedTo) {

core/src/main/java/com/sk89q/worldedit/EditSession.java

@@ -1575,6 +1575,7 @@ public class EditSession extends AbstractDelegateExtent implements HasFaweQueue,
 
     public boolean canBypassAll(Region region, boolean get, boolean set) {
         if (wrapped) return false;
+        if (history != null) return false;
         FaweRegionExtent regionExtent = getRegionExtent();
         if (!(region instanceof CuboidRegion)) return false;
         if (regionExtent != null) {