Modpack version
1.82a
Issue
Using the Cyclic Experience pylon, you can dupe exp really quickly and effectively. Drain your exp from crouching on top of it while set to collect orbs, then immediately set to spray orbs. Gives more exp than was taken, for example from 69 levels worth to 91.

I do not believe I can fix this, and the majority of modders no longer support 1.12, so I'll close this issue.

Nethertheless, thank you for reporting :)

New note: Apparently don't need to set it to collect, just crouch on it while it's set to spray orbs and you're duping even faster now.

Wow that's... interesting :P
Thanks for the report!

Haha. I see someone else reported this already. I think I ended up with two fully loaded XP pylons, and my character was 120. Then, I cheated in two more XP pylons just to make sure I could reproduce the bug. Now, I have FOUR fully loaded XP pylons, and my character is still level 120. I'll just use Tome of Knowledge this playthrough. :-)