Structure loading broken

When I try to load a saved structure (problem may ocurr while saving, not when loading, but I can't check) it basically doesn't work. When I click "load" and I exit the window, the structure block, that was in LOAD mode, appears to have the SAVE texture, but it quickly goes back to the load one. And... it does nothing. I tried 3 times and nothing happened.

simulation:

1. /give yourself a structure block.
2. Make a structure and save it as normal
3. Try to load it
4. Note it does nothing

important notice: it may be a pack problem (I don't have time to check)

For that, try also doing it with the following mods/packs  :

1. Real light rewritten 1.0
2. GLXIPE shaders
3. Faithful PE 32x

Structure block