Crowno.
There is no "favoritism" for one console or platform over the other. (this is where I recall the tales over time from Terraria's past when each console side declared that clearly there was a bias for the other console in similar situations - and make note that it has been both sides making that claim about the other
)
This is just a nuance of XB1 that doesn't happen to exist on PS4. The notion that the team isn't testing/working on it in favor of PS4 is simply not true. That said, hopefully some concrete news soon from our friends at PW.