Blizzard have announced they will be testing the Dragonflight hotfix process, using the Paladin class as a Guinea pig for the process, so there will be some strange changes coming to it today.
Hotfix testing (Source)
Today, we’re planning to test our hotfix process. Specifically, we’re going to deploy hotfixes to the Paladin class. This will involve changing various states of both the class and individual spec trees, possibly breaking individual talents or the UI in the process of doing so. You might see some temporary talents added or removed, and the state of the talent trees and any node connections will change throughout the day.
We expect to return the class back to how it previously looked and felt, once we’re done with this test exercise.