Battleground opponent

Still going against the same opponents back to back when there is more than 3 people left.
After patch 16.2
“Players will not encounter the same opponent or their Kel’Thuzad for 3 rounds since last fighting them, unless there are 2 players remaining.”

There was more to that note right after that text:

Note: This change is being implemented with the 16.2 update, however, it will go live with a later server-side update.

My guess is that they haven’t pushed that update yet.