diff --git a/src/engine/platform/amiga.cpp b/src/engine/platform/amiga.cpp
index e6b92122e..5356e9d6e 100644
--- a/src/engine/platform/amiga.cpp
+++ b/src/engine/platform/amiga.cpp
@@ -250,7 +250,9 @@ int DivPlatformAmiga::dispatch(DivCommand c) {
       break;
     }
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      }
       chan[c.chan].inPorta=c.value;
       break;
     case DIV_CMD_GET_VOLMAX:
diff --git a/src/engine/platform/ay.cpp b/src/engine/platform/ay.cpp
index 2c98d8bb1..4eea30b3d 100644
--- a/src/engine/platform/ay.cpp
+++ b/src/engine/platform/ay.cpp
@@ -315,7 +315,9 @@ int DivPlatformAY8910::dispatch(DivCommand c) {
       return 15;
       break;
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      }
       chan[c.chan].inPorta=c.value;
       break;
     case DIV_CMD_PRE_NOTE:
diff --git a/src/engine/platform/ay8930.cpp b/src/engine/platform/ay8930.cpp
index b058629f9..b167edd14 100644
--- a/src/engine/platform/ay8930.cpp
+++ b/src/engine/platform/ay8930.cpp
@@ -368,7 +368,9 @@ int DivPlatformAY8930::dispatch(DivCommand c) {
       return 31;
       break;
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      }
       chan[c.chan].inPorta=c.value;
       break;
     case DIV_CMD_PRE_NOTE:
diff --git a/src/engine/platform/c64.cpp b/src/engine/platform/c64.cpp
index dc3897baf..f9cc20344 100644
--- a/src/engine/platform/c64.cpp
+++ b/src/engine/platform/c64.cpp
@@ -271,9 +271,11 @@ int DivPlatformC64::dispatch(DivCommand c) {
       chan[c.chan].note=c.value;
       break;
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) {
-        chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
-        chan[c.chan].keyOn=true;
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) {
+          chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+          chan[c.chan].keyOn=true;
+        }
       }
       chan[c.chan].inPorta=c.value;
       break;
diff --git a/src/engine/platform/nes.cpp b/src/engine/platform/nes.cpp
index 8efd2209b..c306ac946 100644
--- a/src/engine/platform/nes.cpp
+++ b/src/engine/platform/nes.cpp
@@ -375,7 +375,9 @@ int DivPlatformNES::dispatch(DivCommand c) {
       chan[c.chan].note=c.value;
       break;
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      }
       chan[c.chan].inPorta=c.value;
       break;
     case DIV_CMD_GET_VOLMAX:
diff --git a/src/engine/platform/pce.cpp b/src/engine/platform/pce.cpp
index 4d8c88b1e..833c43610 100644
--- a/src/engine/platform/pce.cpp
+++ b/src/engine/platform/pce.cpp
@@ -366,7 +366,9 @@ int DivPlatformPCE::dispatch(DivCommand c) {
       chan[c.chan].note=c.value;
       break;
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      }
       chan[c.chan].inPorta=c.value;
       break;
     case DIV_CMD_GET_VOLMAX:
diff --git a/src/engine/platform/saa.cpp b/src/engine/platform/saa.cpp
index 897c53d5c..8ee203822 100644
--- a/src/engine/platform/saa.cpp
+++ b/src/engine/platform/saa.cpp
@@ -262,7 +262,9 @@ int DivPlatformSAA1099::dispatch(DivCommand c) {
       return 15;
       break;
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      }
       chan[c.chan].inPorta=c.value;
       break;
     case DIV_CMD_PRE_NOTE:
diff --git a/src/engine/platform/sms.cpp b/src/engine/platform/sms.cpp
index 86e8d9459..916e18310 100644
--- a/src/engine/platform/sms.cpp
+++ b/src/engine/platform/sms.cpp
@@ -188,7 +188,9 @@ int DivPlatformSMS::dispatch(DivCommand c) {
       chan[c.chan].actualNote=c.value;
       break;
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      }
       chan[c.chan].inPorta=c.value;
       break;
     case DIV_CMD_GET_VOLMAX:
diff --git a/src/engine/platform/tia.cpp b/src/engine/platform/tia.cpp
index f3555f217..4b11e8aad 100644
--- a/src/engine/platform/tia.cpp
+++ b/src/engine/platform/tia.cpp
@@ -215,7 +215,9 @@ int DivPlatformTIA::dispatch(DivCommand c) {
       return 15;
       break;
     case DIV_CMD_PRE_PORTA:
-      if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      if (chan[c.chan].active) {
+        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+      }
       chan[c.chan].inPorta=c.value;
       break;
     case DIV_CMD_PRE_NOTE:
diff --git a/src/engine/platform/ym2610.cpp b/src/engine/platform/ym2610.cpp
index 691982cd9..155151ecc 100644
--- a/src/engine/platform/ym2610.cpp
+++ b/src/engine/platform/ym2610.cpp
@@ -674,7 +674,9 @@ int DivPlatformYM2610::dispatch(DivCommand c) {
       break;
     case DIV_CMD_PRE_PORTA:
       if (c.chan>3) {
-        if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+        if (chan[c.chan].active) {
+          if (parent->song.resetMacroOnPorta) chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
+        }
       }
       chan[c.chan].inPorta=c.value;
       break;