Skript: "set lore of player's tool" Not Working

[Parsafari]

ok so basically I want to lore an item whenever I do /loretest

but when I do it nothing happens to the item (there is also no errors after I reload the script)

here is the script:

command /loretest:
  permission: op
  trigger:
    if player's held item is diamond pickaxe:
      set lore of player's tool to "Lucky Mining||new line"
      send "hey" to player

it says "hey" in chat but nothing happens to the pickaxe. I also have OP permissions and I'm entering the command correctly

[Parsafari]

ok so after 2 hours of banging my head against the wall I found out that :

set line 1 of lore of player's tool to "&7Lucky Mining"

works. you can also choose which line u want the lore to be, its so cool! I'm leaving this here in-case anyone from the future faces the same problem as me, maybe I can help them with this.