I've discovered that the prevent-use flag doesn't seem to prevent players opening shulker boxes.

The IDs I'm using:
`- purple_shulker_box

• white_shulker_box
• orange_shulker_box
• magenta_shulker_box
• light_blue_shulker_box
• yellow_shulker_box
• lime_shulker_box
• pink_shulker_box
• black_shulker_box
• light_gray_shulker_box
• cyan_shulker_box
• blue_shulker_box
• brown_shulker_box
• green_shulker_box
• red_shulker_box
• black_shulker_box`
  If possible could this be fixed?

I'm using the latest 1.12 build of PreciousStones and Spigot: git-Spigot-99c2a37-3819f8d

Thanks for your time.

Try protect-inventories flag.
If that fails which it should not, try LWC manually add
all the shulker box types as lockable but not auto lock.
It was my m8 Jabberwockie that fixed and released
LWC + Chest shop for 1.9 + which still works now
in 1.12 you can download it from a comment on the
bukkit LWC/Chest shop sites. We fixed it to help
protect Slimefun blocks but it was added as a
PStones ability ( \O/ THANK YOU! ) shortly after.

In core.yml (LWC) under
blocks:
white_shulker_box:
enabled: true
silver_shulker_box:
enabled: true
gray_shulker_box:
enabled: true
black_shulker_box:
enabled: true
lime_shulker_box:
enabled: true
green_shulker_box:
enabled: true
blue_shulker_box:
enabled: true
light_blue_shulker_box:
enabled: true
cyan_shulker_box:
enabled: true
yellow_shulker_box:
enabled: true
orange_shulker_box:
enabled: true
brown_shulker_box:
enabled: true
pink_shulker_box:
enabled: true
magenta_shulker_box:
enabled: true
purple_shulker_box:
enabled: true
red_shulker_box:
enabled: true

or try PStone flag
?protect-inventories: true

Now just /ps toggle protect-inventories in game as required.

Thanks, I've gone with the "?protect-invetories: true" flag. So anyone who needs to protect the shulker boxes can without it breaking villager trading and item menus by default.

Still unfortunate shulker boxes can't be prevent-use, are they perhaps implemented differently than other blocks (chests, beacons etc.) I wonder?

BTW if you /info with an empty hand then right click a placed red shulker
box you will note it has a block id of 223:1 not 223 or 223:0
try adding 223:1 to prevent use instead see if that works for red shulker boxes, if so add the rest ;)

Thanks for the idea, I tried it but no luck unfortunately.

I think the data value represents to rotation of the box.

Not rotation :D try giving a 223:10 place it..
does it stack with a 223:0 after pick up? Nope.
It now also has a hidden meta line.

Scary Shulker Boxes!