On my server, I have a series of items that, when held, trigger a command block to do something, whether it be granting potion effects or whatever. I've encountered an issue on this server and on servers on other hosting sites, in which I have a working item, I duplicate the item using middle click, and the item no longer works. It's obviously a different item that is somehow creating in this scenario, since it doesn't stack with the original item, but I have no idea how it's different. The advanced tooltips say the NBT data is the same, and even if it wasn't, the duplicated item still has the trait that should, in theory, trigger the command block.
This issue has never taken place on a single-player, non-server world. I'm completely willing to elaborate if you need elaboration. I've narrowed it down to either some built-in anticheat that manipulates item data, or just an unintentional bug. Does anyone have any ideas on what this could be, or am I just screwed?
If you don't have any ideas, or if you've never heard of anything like this, please just say something. I'd rather have a slew of "idk man" replies than no replies at all. Thanks in advance!