I am going through the Season Journey for the first time. I am currently in Slayer, and the remaining objectives are the three Keywarden objectives.

It states that I need to kill each one in Torment I or higher. The first time I killed them in Torment 10 in a two player game and did not get the objective. I tried again in a two player game at Torment I and it did not work. Then I tried in Torment I in a single player game and it did not work. I did get a few keys from the Keywarden but did not complete the quest.

Has anybody already complete them? It seemed pretty straightforward, but do I need to do certain thing first before killing them?

if you're on that chapter you shouldn't have to do anything prior.. but i do know it can be a bit buggy sometimes when updating your progression in the season journey. try doing everything else and seeing if the chapter is complete yet, unless that is the last thing you have to do. not sure what else to tell u. myself, i'm done with all chapters and the only thing i did in a party was the t10 rift in under 2min conquest.

but i do know for a fact that i had to refresh the game for it to update my progress on some of the chapters