There's already an official response by blizzard on their twitter saying it was intentional.
https://twitter.com/WarcraftDevs/status/1105891459922833408
Bugs don't "coincidentally do" anything, that's why they are called bugs. It's an unintended outcome. They could have fixed one thing and accidentally messed up something completely unrelated.
Really hoping it's not intentional and it's just a bug, but yea... My sub ends in 7 days. If it's not fixed, I'm out. I have 0 desire to play my 120 at all. End game this expansion is horrible.