diff --git a/src/server/game/AI/ScriptedAI/ScriptedCreature.cpp b/src/server/game/AI/ScriptedAI/ScriptedCreature.cpp
index 62467c5175..9a9a407948 100644
--- a/src/server/game/AI/ScriptedAI/ScriptedCreature.cpp
+++ b/src/server/game/AI/ScriptedAI/ScriptedCreature.cpp
@@ -618,7 +618,11 @@ BossAI::BossAI(Creature* creature, uint32 bossId) : ScriptedAI(creature),
 {
     callForHelpRange = 0.0f;
     if (instance)
+    {
         SetBoundary(instance->GetBossBoundary(bossId));
+        if (creature->GetSpawnId())
+            instance->RegisterBossSpawn(creature->GetSpawnId(), bossId);
+    }
 
     // Prevents updating the scheduler's timer while the creature is casting.
     // Clear it in the script if you need it to update while the creature is casting.
diff --git a/src/server/game/Entities/Creature/Creature.cpp b/src/server/game/Entities/Creature/Creature.cpp
index 8f84bd3351..2182bd8d02 100644
--- a/src/server/game/Entities/Creature/Creature.cpp
+++ b/src/server/game/Entities/Creature/Creature.cpp
@@ -2154,8 +2154,13 @@ void Creature::Respawn(bool force)
             if (m_spawnId)
             {
                 // Set respawn time to now so ProcessRespawns() picks it up
-                time_t now = GameTime::GetGameTime().count();
-                GetMap()->SaveCreatureRespawnTime(m_spawnId, now);
+                if (force)
+                    GetMap()->ForceCreatureRespawn(m_spawnId);
+                else
+                {
+                    time_t now = GameTime::GetGameTime().count();
+                    GetMap()->SaveCreatureRespawnTime(m_spawnId, now);
+                }
             }
             AddObjectToRemoveList();
         }
diff --git a/src/server/game/Instances/InstanceSaveMgr.cpp b/src/server/game/Instances/InstanceSaveMgr.cpp
index 14ce15f25d..6cc5048c40 100644
--- a/src/server/game/Instances/InstanceSaveMgr.cpp
+++ b/src/server/game/Instances/InstanceSaveMgr.cpp
@@ -360,10 +360,12 @@ void InstanceSaveMgr::LoadResetTimes()
             // calculate the next reset time
             t = (t / DAY) * DAY;
             t += ((today - t) / period + 1) * period + diff;
+            SetResetTimeFor(mapid, difficulty, t);
             CharacterDatabase.DirectExecute("UPDATE instance_reset SET resettime = '{}' WHERE mapid = '{}' AND difficulty = '{}'", (uint32)t, mapid, difficulty);
         }
 
-        SetExtendedResetTimeFor(mapid, difficulty, t);
+        // An extended lock runs one period past the reset, as _ResetOrWarnAll sets it after a runtime reset
+        SetExtendedResetTimeFor(mapid, difficulty, t + period);
 
         // schedule the global reset/warning
         uint8 type;
diff --git a/src/server/game/Instances/InstanceScript.cpp b/src/server/game/Instances/InstanceScript.cpp
index cf4d56aa0f..16b336ca91 100644
--- a/src/server/game/Instances/InstanceScript.cpp
+++ b/src/server/game/Instances/InstanceScript.cpp
@@ -87,6 +87,12 @@ void InstanceScript::OnCreatureRemove(Creature* creature)
     RemoveMinion(creature);
 }
 
+bool InstanceScript::IsBossSpawnDone(ObjectGuid::LowType spawnId) const
+{
+    auto itr = _bossSpawns.find(spawnId);
+    return itr != _bossSpawns.end() && GetBossState(itr->second) == DONE;
+}
+
 void InstanceScript::OnGameObjectCreate(GameObject* go)
 {
     AddObject(go);
diff --git a/src/server/game/Instances/InstanceScript.h b/src/server/game/Instances/InstanceScript.h
index 8b9c1e6779..f97999d7cb 100644
--- a/src/server/game/Instances/InstanceScript.h
+++ b/src/server/game/Instances/InstanceScript.h
@@ -250,6 +250,9 @@ public:
 
     virtual bool SetBossState(uint32 id, EncounterState state);
     EncounterState GetBossState(uint32 id) const { return id < bosses.size() ? bosses[id].state : TO_BE_DECIDED; }
+    // Spawns a BossAI bound to an encounter; the respawn system keeps them down while it is DONE
+    void RegisterBossSpawn(ObjectGuid::LowType spawnId, uint32 bossId) { _bossSpawns[spawnId] = bossId; }
+    bool IsBossSpawnDone(ObjectGuid::LowType spawnId) const;
     static std::string GetBossStateName(uint8 state);
     CreatureBoundary const* GetBossBoundary(uint32 id) const { return id < bosses.size() ? &bosses[id].boundary : nullptr; }
     BossInfo const* GetBossInfo(uint32 id) const { return &bosses[id]; }
@@ -351,6 +354,7 @@ private:
     DoorInfoMap doors;
     MinionInfoMap minions;
     ObjectInfoMap _creatureInfo;
+    std::unordered_map<ObjectGuid::LowType, uint32 /*bossId*/> _bossSpawns;
     ObjectInfoMap _gameObjectInfo;
     ObjectInfoMap _summonInfo;
     ObjectGuidMap _objectGuids;
diff --git a/src/server/game/Maps/Map.cpp b/src/server/game/Maps/Map.cpp
index 86b86a2729..ba4c57ed8e 100644
--- a/src/server/game/Maps/Map.cpp
+++ b/src/server/game/Maps/Map.cpp
@@ -2519,6 +2519,13 @@ void Map::RemoveCreatureRespawnTime(ObjectGuid::LowType spawnId)
     CharacterDatabase.Execute(stmt);
 }
 
+void Map::ForceCreatureRespawn(ObjectGuid::LowType spawnId)
+{
+    time_t now = GameTime::GetGameTime().count();
+    SaveCreatureRespawnTime(spawnId, now);
+    _forcedCreatureRespawns.insert(spawnId);
+}
+
 void Map::SaveGORespawnTime(ObjectGuid::LowType spawnId, time_t& respawnTime)
 {
     if (!respawnTime)
@@ -2810,6 +2817,9 @@ void Map::ProcessRespawns()
 
 void Map::ProcessCreatureRespawn(ObjectGuid::LowType spawnId)
 {
+    // Consumed by every attempt, or a mark set on a continent would never go away
+    bool const forced = _forcedCreatureRespawns.erase(spawnId) != 0;
+
     // Pool members are handled entirely by the pool system on this map's pool data
     if (uint32 poolId = sPoolMgr->IsPartOfAPool<Creature>(spawnId))
     {
@@ -2860,14 +2870,25 @@ void Map::ProcessCreatureRespawn(ObjectGuid::LowType spawnId)
         }
     }
 
+    // A spawn whose BossAI bound it to a DONE encounter stays down, as BossAI::CanRespawn keeps
+    // compat-mode spawns down. The expired row is kept so a reload still loads the boss dead, and
+    // the check repeats like an inactive group's. A forced Respawn() passes, as force does in compat mode.
+    if (InstanceMap* instanceMap = ToInstanceMap())
+        if (InstanceScript* script = instanceMap->GetInstanceScript())
+            if (!forced && script->IsBossSpawnDone(spawnId))
+            {
+                _respawnQueue.insert({GameTime::GetGameTime().count() + 5, SPAWN_TYPE_CREATURE, spawnId});
+                return;
+            }
+
     // Check linked_respawn: don't spawn if the master creature is still dead.
     // This mirrors the check in Creature::Respawn() for compat-mode creatures:
-    // hard-reset creatures bypass it (they despawn on evade and must always
-    // come back), and a creature linked to itself never auto-respawns.
+    // hard-reset creatures and forced respawns bypass it (the former despawn on
+    // evade and must always come back), and a creature linked to itself never auto-respawns.
     ObjectGuid dbtableHighGuid = ObjectGuid::Create<HighGuid::Unit>(data->id, spawnId);
     time_t linkedRespawntime = GetLinkedRespawnTime(dbtableHighGuid);
     CreatureTemplate const* cInfo = sObjectMgr->GetCreatureTemplate(data->id);
-    if (linkedRespawntime && !(cInfo && cInfo->HasFlagsExtra(CREATURE_FLAG_EXTRA_HARD_RESET)))
+    if (linkedRespawntime && !forced && !(cInfo && cInfo->HasFlagsExtra(CREATURE_FLAG_EXTRA_HARD_RESET)))
     {
         time_t now = GameTime::GetGameTime().count();
         time_t newRespawnTime;
diff --git a/src/server/game/Maps/Map.h b/src/server/game/Maps/Map.h
index 6eb3d4de6d..c74bab8363 100644
--- a/src/server/game/Maps/Map.h
+++ b/src/server/game/Maps/Map.h
@@ -433,6 +433,8 @@ public:
 
     void SaveCreatureRespawnTime(ObjectGuid::LowType dbGuid, time_t& respawnTime);
     void RemoveCreatureRespawnTime(ObjectGuid::LowType dbGuid);
+    // Queues the spawn for the next respawn pass and lets it through the DONE-boss hold, as force bypasses CanRespawn in compat mode
+    void ForceCreatureRespawn(ObjectGuid::LowType dbGuid);
     void SaveGORespawnTime(ObjectGuid::LowType dbGuid, time_t& respawnTime);
     void RemoveGORespawnTime(ObjectGuid::LowType dbGuid);
     [[nodiscard]] std::unordered_map<ObjectGuid::LowType, time_t> const& GetCreatureRespawnTimes() const { return _creatureRespawnTimes; }
@@ -649,6 +651,7 @@ private:
     void _RemoveObjectFromUpdateList(WorldObject* obj);
 
     std::unordered_map<ObjectGuid::LowType /*dbGUID*/, time_t> _creatureRespawnTimes;
+    std::unordered_set<ObjectGuid::LowType> _forcedCreatureRespawns;
     std::unordered_map<ObjectGuid::LowType /*dbGUID*/, time_t> _goRespawnTimes;
 
     // Time-ordered index for ProcessRespawns() — avoids O(n) full scan.
diff --git a/src/server/scripts/Commands/cs_misc.cpp b/src/server/scripts/Commands/cs_misc.cpp
index 2598fbf75b..5cfc67f586 100644
--- a/src/server/scripts/Commands/cs_misc.cpp
+++ b/src/server/scripts/Commands/cs_misc.cpp
@@ -2563,10 +2563,7 @@ public:
         }
         // Also trigger via respawn time queue for fully-removed spawns
         if (map->GetCreatureRespawnTime(spawnId) > 0)
-        {
-            time_t now = GameTime::GetGameTime().count();
-            map->SaveCreatureRespawnTime(spawnId, now);
-        }
+            map->ForceCreatureRespawn(spawnId);
         handler->PSendSysMessage(LANG_RESPAWN_GUID_CREATURE_QUEUED, spawnId, creData->id);
         return true;
     }
@@ -2658,7 +2655,6 @@ public:
             return false;
         }
 
-        time_t now = GameTime::GetGameTime().count();
         uint32 count = 0;
 
         // Phase 1: respawn dead corpses that are still tracked in the spawn-id store.
@@ -2691,7 +2687,7 @@ public:
         }
         for (ObjectGuid::LowType spawnId : toRespawn)
         {
-            map->SaveCreatureRespawnTime(spawnId, now);
+            map->ForceCreatureRespawn(spawnId);
             ++count;
         }