As I mentioned above, the structure block is not showing outline when I try to save and load my structures, weird enough the corner mode are not affected, I'm not sure if this also happen to anyone or just me, please help!

Update: Well... actually I figured it out my own, it's very awkward though, I forgot to add the structure size and instead of that I input those digits in relative position... and afraid that the load button will immediate spawn the structure (I'm neat), since I had switch to Windows 10 Edition for quite some time and I've forgot something