Structure box size changes when an existing structure is edited

When the size of a previously saved structure is changed, the box initially shows as changed, but the box reverts to the initial size after exiting and reentering the structure block interface. It doesn’t matter is a player hit save or not, and the only way to resave the box size permanently is by entering into load mode and then changing back to save mode. This issue often causes me to accidentally save something as the wrong size after having previously edited the box size to make it fit a desired area. I am then forced to renter the dimensions again. 

Steps To Reproduce: 

1. Get a structure block and save any structure

2. Load that structure somewhere else and change the dimensions of the structure box before hitting save again

3. Exit the structure block interface

4. Enter the structure block interface again

5. Notice that the structure box appear glitched, and the dimensions listed have reverted back to the original structure size even though the structure was saved again

6. Enter load mode, then switch back to save mode

7. Notice that the structure dimensions are now correct

Expected Results: The structure blocks retains the new dimensions when a structure is saved even after going in and out of the interface