This should work:

Code (Text):

1. #Delete last line
2. set {_s} to size of lore of loop-item
3. delete line {_s} of lore of loop-item

 

Hmm, I can’t test if this works at the moment, but perhaps you can try to save the item as a (temp) variable, i.e.

Code (Text):

1. set {_item} to loop-item

Then change the lore of that.

If that doesn’t work, then I’m not really sure haha

 

Are you sure? This returns no errors for me:

Code (Text):

1. on death of player:
2.     loop drops:
3.         if lore of loop-item contains "&7Soulbound I":
4.             remove loop-item from drops
5.             set {_i} to loop-item
6.             set {_s} to size of lore of {_i}
7.             delete line {_s} of lore of {_i}
8.             wait 5 ticks
9.             add {_s} to victim's inventory

 

Does it still happen when nothing is done to the lore of the item?

Code (Text):

1. on death of player:
2.     loop drops:
3.         if lore of loop-item contains "&7Soulbound I":
4.             remove loop-item from drops
5.             wait 5 ticks
6.             add loop-item to victim's inventory

 

It's because they put 5 ticks delay directly into loop. Try this:

Code (Text):

1.  
2. on death of player:
3.     loop drops:
4.         if lore of loop-item contains "&7Soulbound I":
5.             remove loop-item from drops
6.             set {_i} to loop-item
7.             set {_s} to size of lore of {_i}
8.             delete line {_s} of lore of {_i}
9.             add {_i} to {_to.give}
10.     wait 5 ticks
11.     add {_to.give} to victim's inventory

 

Whoops.. forgot to make it array variable:

Code (Text):

1.  
2. on death of player:
3.     loop drops:
4.         if lore of loop-item contains "&7Soulbound I":
5.             remove loop-item from drops
6.             set {_i} to loop-item
7.             set {_s} to size of lore of {_i}
8.             delete line {_s} of lore of {_i}
9.             add {_i} to {_to.give::*}
10.     wait 5 ticks
11.     add {_to.give::*} to victim's inventory
12.  

 

You are welcome:3