I have a plugin that players can get a custom item called `Chunk Buster`. When a player gets one and places it on ground, my plugin tries to look for the matching ChunkBuster object by checking for the similar item (using ItemStack#isSimilar).

However, something is wrong in 1.20.5. In 1.20.4, the plugin matches a correct item:
https://pastebin.com/6hBqKUz6
In 1.20.5 on the other hand, it fails as shown here:
https://pastebin.com/yyJch82m

The hash and toString of the ItemStacks are similar, yet in 1.20.5 the isSimilar returns false.
It seems like the durability of the item changed.
Even if I give myself the item again, it seems to not work.

The following code also doesn't seem to print anything:
https://pastebin.com/zbAasLVg