Zeroing on scopes is now defaulted to the Short Range distance (75m) when you first enter a map. This changed with the 23 July update - it should be set to the Medium Range (150m). I submitted a ticket.
The cycle order through 75 - 150 - 300 has also changed. Beware if you're scope-tracking a fleeing animal and try to change to Long Range the way you did before.
-Cycle Before: 150, then 75, then 300 (2 clicks to go from Medium to Long Range)
-Cycle Now: 150, then 300, then 75 (1 click to go from Medium to Long Range)
Cycle order will have to be returned to 150 - 75 - 300, because as you Buy the Zeroing Perk, 1 Point gets you Short Range (75m), 2 Points gets you Long Range (300m). Choosing just 1 Point in Zeroing is why the original cycle order went from 150 - 75 - 300.