Haste II Beacon not working
Solution 1:
So, as Fabian suggested in the comments, I missed a step.
- Build the beacon, and the appropriate pyramid size.
- Choose your enchantment from the left side to add it to the list of available enchantments
- Select it from the right side to "turn it on".
- Power it with an item.
I missed step 3.
I still don't understand why the effect appeared on my HUD, when it had not properly been selected in the beacon, it may be a bug, but I don't know.