Industrial Foregoing Version:
1.19.2-3.3.2.2-4

Titanium Version:
1.19.2-3.7.2-26

I found that when you're using an infinity backpack the amount of experience gained (liquid) can give you a multiplier of 70-120 times the amount of xp that you would normally pickup.
There are several mods that give you the ability to pickup xp-orbs and turn them into liquid xp and back again while remaining the same.
i.e. Starting with 1000mb of xp, turning them back in to orbs/xp level and then back to liquid will stay 1000mb
Now if you're holding the infinity backpack, the picked up orbs turn in to 70.000mb-100.000 mb, wait a few seconds and the liquid xp in the back will keep going up until full. 1000mb turned into 1.000.000 mb of xp.