A wizard rounds a corner to find two kobolds brandishing their weapons. Roll initiative!
The DM determines that neither side is surprised. The DM then makes a single initiative roll (10) for the two kobolds, since they are identical creatures (PHB, p. 189). The wizard has a great roll (15) and goes first.
The wizard decides that it's better to be safe than sorry and upcasts hold person to 3rd-level, targeting both kobolds. One kobold fails the save and becomes paralyzed, but the other (miraculously) succeeds. The wizard now feels confident in their success and closes to within 5 feet of both kobolds.
It's time for the kobolds to act. Kobolds have the Pack Tactics trait, which grants them advantage on attack rolls against a creature if a non-incapacitated ally is within 5 feet of that creature. One of the kobolds is paralyzed, which means it is also incapacitated. Hold person grants an additional save at the end of the affected kobold's turns.
Each kobold should have their own turn, but does one turn complete before the other, possibly allowing the paralyzed kobold to save vs hold person? In short, is there any way that the non-paralyzed kobold gains advantage from Pack Tactics on this initiative count this round?