CLOSES #1519

src/world/OverworldController.lua

@@ -329,6 +329,10 @@ function OverworldState:setMap(mapId, x, y, facing, opts)
     MapLoader.invalidateAll()
   end
   self.map = MapLoader.load(Game.data, mapId)
+  -- EnterMap -> ClearVariablesOnEnterMap zeroes wStepCounter
+  -- (engine/overworld/clear_variables.asm:7), but a connection crossing
+  -- never reaches EnterMap (home/overworld.asm:675 .loadNewMap)
+  if not (opts and opts.seamless) then Game.save.poisonSteps = 0 end
   -- STRENGTH deactivates on every real map load (home/overworld.asm
   -- EnterMap -> ResetUsingStrengthOutOfBattleBit clears BIT_STRENGTH_ACTIVE
   -- of wStatusFlags1).  setMap is the single choke point for every map-id
@@ -4296,6 +4300,9 @@ end
 -- battle is optional; when given, Oak's Lab OPP_RIVAL1 losses skip the
 -- blackout (pret HandlePlayerBlackOut) so the map script can HealParty.
 function OverworldState:afterBattle(result, battle)
+  -- .battleOccurred tail-jumps to EnterMap (home/overworld.asm:353), so
+  -- ClearVariablesOnEnterMap zeroes wStepCounter on every battle return
+  Game.save.poisonSteps = 0
   if battle and battle.kind == "wild" then
     self.wildEncounterGraceSteps = WILD_ENCOUNTER_GRACE_STEPS
   end