diff --git a/soh/soh/Enhancements/game-interactor/vanilla-behavior/GIVanillaBehavior.h b/soh/soh/Enhancements/game-interactor/vanilla-behavior/GIVanillaBehavior.h
index 66b5f728ba..25b7074a32 100644
--- a/soh/soh/Enhancements/game-interactor/vanilla-behavior/GIVanillaBehavior.h
+++ b/soh/soh/Enhancements/game-interactor/vanilla-behavior/GIVanillaBehavior.h
@@ -3239,6 +3239,13 @@ typedef enum {
 
     // #### `result`
     // ```c
+    // false if Link is adult, water level is lowered, and entering Lake from Domain
+    // ```
+    // #### `args`
+    // - `Player*`
+    VB_LAKE_HYLIA_PREVENT_DOMAIN_SWIM,
+
+    // #### `result`
     // true if Goron Link is talking
     // ```
     // #### `args`
diff --git a/soh/soh/Enhancements/randomizer/hook_handlers.cpp b/soh/soh/Enhancements/randomizer/hook_handlers.cpp
index 85deb7d66c..65c29c184e 100644
--- a/soh/soh/Enhancements/randomizer/hook_handlers.cpp
+++ b/soh/soh/Enhancements/randomizer/hook_handlers.cpp
@@ -1851,6 +1851,17 @@ void RandomizerOnVanillaBehaviorHandler(GIVanillaBehavior id, bool* should, va_l
             *should = false;
             break;
         }
+        case VB_LAKE_HYLIA_PREVENT_DOMAIN_SWIM: {
+            // Don't swim as adult coming from Domain to Lake with low water.
+            // Caused by waterbox first frame y surface always being -1313.0f
+            Player* player = va_arg(args, Player*);
+            if (gPlayState->sceneNum == SCENE_LAKE_HYLIA && LINK_IS_ADULT &&
+                !Flags_GetEventChkInf(EVENTCHKINF_RAISED_LAKE_HYLIA_WATER) && player->actor.world.pos.y > -1550.0f &&
+                player->actor.world.pos.y < -1500.0f) {
+                *should = false;
+            }
+            break;
+        }
         case VB_BE_ELIGIBLE_FOR_RAINBOW_BRIDGE: {
             *should = MeetsRainbowBridgeRequirements();
             break;
diff --git a/soh/src/code/z_actor.c b/soh/src/code/z_actor.c
index c37d4b61df..3bde2e1eb1 100644
--- a/soh/src/code/z_actor.c
+++ b/soh/src/code/z_actor.c
@@ -3335,6 +3335,7 @@ Actor* Actor_Spawn(ActorContext* actorCtx, PlayState* play, s16 actorId, f32 pos
     }
 
     if (actorCtx->total > ACTOR_NUMBER_MAX) {
+        LUSLOG_WARN("Actor_Spawn: Actor number max exceeded");
         // "Ａｃｔｏｒ set number exceeded"
         osSyncPrintf(VT_COL(YELLOW, BLACK) "Ａｃｔｏｒセット数オーバー\n" VT_RST);
         return NULL;
@@ -3358,6 +3359,7 @@ Actor* Actor_Spawn(ActorContext* actorCtx, PlayState* play, s16 actorId, f32 pos
     actor = ZELDA_ARENA_MALLOC_DEBUG(dbEntry->instanceSize);
 
     if (actor == NULL) {
+        LUSLOG_WARN("Actor_Spawn: Cannot allocate actor %s (0x%x)", dbEntry->name, actorId);
         // "Actor class cannot be reserved! %s <size＝%d bytes>"
         osSyncPrintf(VT_COL(RED, WHITE) "Ａｃｔｏｒクラス確保できません！ %s <サイズ＝%dバイト>\n", VT_RST,
                      dbEntry->name, dbEntry->instanceSize);
@@ -4930,7 +4932,7 @@ s32 Flags_GetEventChkInf(s32 flag) {
  * Sets "eventChkInf" flag.
  */
 void Flags_SetEventChkInf(s32 flag) {
-    u8 previouslyOff = !Flags_GetEventChkInf(flag);
+    s32 previouslyOff = !Flags_GetEventChkInf(flag);
     gSaveContext.eventChkInf[flag >> 4] |= (1 << (flag & 0xF));
     if (previouslyOff) {
         LUSLOG_INFO("EventChkInf Flag Set - %#x", flag);
@@ -4942,7 +4944,7 @@ void Flags_SetEventChkInf(s32 flag) {
  * Unsets "eventChkInf" flag.
  */
 void Flags_UnsetEventChkInf(s32 flag) {
-    u8 previouslyOn = Flags_GetEventChkInf(flag);
+    s32 previouslyOn = Flags_GetEventChkInf(flag);
     gSaveContext.eventChkInf[flag >> 4] &= ~(1 << (flag & 0xF));
     if (previouslyOn) {
         LUSLOG_INFO("EventChkInf Flag Unset - %#x", flag);
@@ -4961,7 +4963,7 @@ s32 Flags_GetItemGetInf(s32 flag) {
  * Sets "itemGetInf" flag.
  */
 void Flags_SetItemGetInf(s32 flag) {
-    u8 previouslyOff = !Flags_GetItemGetInf(flag);
+    s32 previouslyOff = !Flags_GetItemGetInf(flag);
     gSaveContext.itemGetInf[flag >> 4] |= (1 << (flag & 0xF));
     if (previouslyOff) {
         LUSLOG_INFO("ItemGetInf Flag Set - %#x", flag);
@@ -4973,7 +4975,7 @@ void Flags_SetItemGetInf(s32 flag) {
  * Unsets "itemGetInf" flag.
  */
 void Flags_UnsetItemGetInf(s32 flag) {
-    u8 previouslyOn = Flags_GetItemGetInf(flag);
+    s32 previouslyOn = Flags_GetItemGetInf(flag);
     gSaveContext.itemGetInf[flag >> 4] &= ~(1 << (flag & 0xF));
     if (previouslyOn) {
         LUSLOG_INFO("ItemGetInf Flag Unset - %#x", flag);
@@ -4992,7 +4994,7 @@ s32 Flags_GetInfTable(s32 flag) {
  * Sets "infTable" flag.
  */
 void Flags_SetInfTable(s32 flag) {
-    u8 previouslyOff = !Flags_GetInfTable(flag);
+    s32 previouslyOff = !Flags_GetInfTable(flag);
     gSaveContext.infTable[flag >> 4] |= (1 << (flag & 0xF));
     if (previouslyOff) {
         LUSLOG_INFO("InfTable Flag Set - %#x", flag);
@@ -5004,7 +5006,7 @@ void Flags_SetInfTable(s32 flag) {
  * Unsets "infTable" flag.
  */
 void Flags_UnsetInfTable(s32 flag) {
-    u8 previouslyOn = Flags_GetInfTable(flag);
+    s32 previouslyOn = Flags_GetInfTable(flag);
     gSaveContext.infTable[flag >> 4] &= ~(1 << (flag & 0xF));
     if (previouslyOn) {
         LUSLOG_INFO("InfTable Flag Unset - %#x", flag);
@@ -5023,7 +5025,7 @@ s32 Flags_GetEventInf(s32 flag) {
  * Sets "eventInf" flag.
  */
 void Flags_SetEventInf(s32 flag) {
-    u8 previouslyOff = !Flags_GetEventInf(flag);
+    s32 previouslyOff = !Flags_GetEventInf(flag);
     gSaveContext.eventInf[flag >> 4] |= (1 << (flag & 0xF));
     if (previouslyOff) {
         LUSLOG_INFO("EventInf Flag Set - %#x", flag);
@@ -5035,7 +5037,7 @@ void Flags_SetEventInf(s32 flag) {
  * Unsets "eventInf" flag.
  */
 void Flags_UnsetEventInf(s32 flag) {
-    u8 previouslyOn = Flags_GetEventInf(flag);
+    s32 previouslyOn = Flags_GetEventInf(flag);
     gSaveContext.eventInf[flag >> 4] &= ~(1 << (flag & 0xF));
     if (previouslyOn) {
         LUSLOG_INFO("EventInf Flag Unset - %#x", flag);
diff --git a/soh/src/overlays/actors/ovl_player_actor/z_player.c b/soh/src/overlays/actors/ovl_player_actor/z_player.c
index 394760402b..85997712a2 100644
--- a/soh/src/overlays/actors/ovl_player_actor/z_player.c
+++ b/soh/src/overlays/actors/ovl_player_actor/z_player.c
@@ -6629,32 +6629,36 @@ void func_8083C8DC(Player* this, PlayState* play, s16 arg2) {
     func_8083C858(this, play);
 }
 
-s32 func_8083C910(PlayState* play, Player* this, f32 arg2) {
-    WaterBox* sp2C;
-    f32 sp28;
+/**
+ * @return false if player starting movement is swimming, otherwise true
+ */
+s32 Player_SetStartingMovement(PlayState* play, Player* this, f32 arg2) {
+    WaterBox* waterbox;
+    f32 ySurface;
 
-    sp28 = this->actor.world.pos.y;
-    if (WaterBox_GetSurface1(play, &play->colCtx, this->actor.world.pos.x, this->actor.world.pos.z, &sp28, &sp2C) !=
-        0) {
-        sp28 -= this->actor.world.pos.y;
-        if (this->ageProperties->unk_24 <= sp28) {
+    ySurface = this->actor.world.pos.y;
+    if (WaterBox_GetSurface1(play, &play->colCtx, this->actor.world.pos.x, this->actor.world.pos.z, &ySurface,
+                             &waterbox) &&
+        GameInteractor_Should(VB_LAKE_HYLIA_PREVENT_DOMAIN_SWIM, true, this)) {
+        ySurface -= this->actor.world.pos.y;
+        if (this->ageProperties->unk_24 <= ySurface) {
             Player_SetupAction(play, this, Player_Action_8084D7C4, 0);
             Player_AnimChangeLoopSlowMorph(play, this, &gPlayerAnim_link_swimer_swim);
             this->stateFlags1 |= PLAYER_STATE1_IN_WATER | PLAYER_STATE1_IN_CUTSCENE;
             this->av2.actionVar2 = 20;
             this->linearVelocity = 2.0f;
             Player_SetBootData(play, this);
-            return 0;
+            return false;
         }
     }
 
     func_80838E70(play, this, arg2, this->actor.shape.rot.y);
     this->stateFlags1 |= PLAYER_STATE1_IN_CUTSCENE;
-    return 1;
+    return true;
 }
 
 void Player_StartMode_Idle(PlayState* play, Player* this) {
-    if (func_8083C910(play, this, 180.0f)) {
+    if (Player_SetStartingMovement(play, this, 180.0f)) {
         this->av2.actionVar2 = -20;
     }
 }
@@ -6662,7 +6666,7 @@ void Player_StartMode_Idle(PlayState* play, Player* this) {
 void Player_StartMode_MoveForwardSlow(PlayState* play, Player* this) {
     this->linearVelocity = 2.0f;
     gSaveContext.entranceSpeed = 2.0f;
-    if (func_8083C910(play, this, 120.0f)) {
+    if (Player_SetStartingMovement(play, this, 120.0f)) {
         this->av2.actionVar2 = -15;
     }
 }
@@ -6674,7 +6678,7 @@ void Player_StartMode_MoveForward(PlayState* play, Player* this) {
 
     this->linearVelocity = gSaveContext.entranceSpeed;
 
-    if (func_8083C910(play, this, 800.0f)) {
+    if (Player_SetStartingMovement(play, this, 800.0f)) {
         this->av2.actionVar2 = -80 / this->linearVelocity;
         if (this->av2.actionVar2 < -20) {
             this->av2.actionVar2 = -20;