[Error] Safari Zone Mode isn't activating, is my custom code breaking Safari Zone mode?

[SuperSpyroDragon64]

Safari Zone Mode isn't activating.

I've entered the default Safari Zone, paying and talking to the NPC and entering as intended, but I'm in regular 3v3 battle mode instead of Safari Battle mode. I cannot throw rocks or Safari Balls. It works normally on unchanged Pokemon Essentials, so it could be one of these changes that's overriding the Safari Zone Battle data.

What's causing this error and how do I fix it?

def pbBattleOnStepTaken(repel_active)
  return if $player.able_pokemon_count == 0
  return if !$PokemonEncounters.encounter_possible_here?
  encounter_type = $PokemonEncounters.encounter_type
  return if !encounter_type
  return if !$PokemonEncounters.encounter_triggered?(encounter_type, repel_active)
  $game_temp.encounter_type = encounter_type
  encounter = $PokemonEncounters.choose_wild_pokemon(encounter_type)
  EventHandlers.trigger(:on_wild_species_chosen, encounter)
  if $PokemonEncounters.allow_encounter?(encounter, repel_active)
      encounter2 = $PokemonEncounters.choose_wild_pokemon(encounter_type)
      EventHandlers.trigger(:on_wild_species_chosen, encounter2)
      encounter3 = $PokemonEncounters.choose_wild_pokemon(encounter_type)
      EventHandlers.trigger(:on_wild_species_chosen, encounter3)
      WildBattle.start(encounter, encounter2, encounter3, can_override: true)
    $game_temp.encounter_type = nil
    $game_temp.encounter_triggered = true
  end
  $game_temp.force_single_battle = false
end

  def setBattleMode(mode)
    @sideSizes =
      case mode
      when "triple", "3v3" then [3, 3]
      when "3v2"           then [3, 2]
      when "3v1"           then [3, 1]
      when "2v3"           then [2, 3]
      when "double", "2v2" then [2, 2]
      when "2v1"           then [2, 1]
      when "1v3"           then [1, 3]
      when "1v2"           then [1, 2]
      else                      [3, 3]   # 3v3 new default
      end
  end