There seems to be a bug with the duration of the Greater Calling ability post 1.22 update. In the update notes (and in the in-game ability description window) it says how Greater Calling should last for 3 steps, but in the little time I had to test out the new abilities, Greater Calling always wore off after 1st step.

So, the ability is either bugged, or the descriptions of the said ability is not correct. I will test it out again after servers get up after current emergency maintenance.