diff --git a/core/src/mindustry/logic/LExecutor.java b/core/src/mindustry/logic/LExecutor.java
index ae4a1c8f0d..7f88186d38 100644
--- a/core/src/mindustry/logic/LExecutor.java
+++ b/core/src/mindustry/logic/LExecutor.java
@@ -967,7 +967,7 @@ public class LExecutor{
             //graphics on headless servers are useless.
             if(Vars.headless) return;
 
-            if(target.building() instanceof LogicDisplayBuild d && (d.team == exec.team || exec.privileged)){
+            if(target.building() instanceof LogicDisplayBuild d && d.isValid() && (d.team == exec.team || exec.privileged)){
                 d.flushCommands(exec.graphicsBuffer);
                 exec.graphicsBuffer.clear();
             }
@@ -1101,8 +1101,7 @@ public class LExecutor{
         @Override
         public void run(LExecutor exec){
 
-            if(target.building() instanceof MessageBuild d && (exec.privileged || (d.team == exec.team && !d.block.privileged))){
-
+            if(target.building() instanceof MessageBuild d && d.isValid() && (exec.privileged || (d.team == exec.team && !d.block.privileged))){
                 d.message.setLength(0);
                 d.message.append(exec.textBuffer, 0, Math.min(exec.textBuffer.length(), maxTextBuffer));
 
diff --git a/core/src/mindustry/world/blocks/logic/CanvasBlock.java b/core/src/mindustry/world/blocks/logic/CanvasBlock.java
index d706801fb5..566704d6e4 100644
--- a/core/src/mindustry/world/blocks/logic/CanvasBlock.java
+++ b/core/src/mindustry/world/blocks/logic/CanvasBlock.java
@@ -226,8 +226,9 @@ public class CanvasBlock extends Block{
             }
         }
 
+        @Override
         public boolean readable(LExecutor exec){
-            return exec.privileged || this.team == exec.team;
+            return isValid() && (exec.privileged || this.team == exec.team);
         }
 
         @Override
@@ -237,7 +238,7 @@ public class CanvasBlock extends Block{
 
         @Override
         public boolean writable(LExecutor exec){
-            return exec.privileged || this.team == exec.team;
+            return readable(exec);
         }
 
         @Override
diff --git a/core/src/mindustry/world/blocks/logic/LogicBlock.java b/core/src/mindustry/world/blocks/logic/LogicBlock.java
index 7c2937abee..d0f1b12be5 100644
--- a/core/src/mindustry/world/blocks/logic/LogicBlock.java
+++ b/core/src/mindustry/world/blocks/logic/LogicBlock.java
@@ -534,7 +534,7 @@ public class LogicBlock extends Block{
 
         @Override
         public boolean readable(LExecutor exec){
-            return exec.privileged || (this.team == exec.team && !this.block.privileged);
+            return isValid() && (exec.privileged || (this.team == exec.team && !this.block.privileged));
         }
 
         @Override
@@ -552,7 +552,7 @@ public class LogicBlock extends Block{
 
         @Override
         public boolean writable(LExecutor exec){
-            return exec.privileged || (this.team == exec.team && !this.block.privileged);
+            return readable(exec);
         }
 
         @Override
diff --git a/core/src/mindustry/world/blocks/logic/MemoryBlock.java b/core/src/mindustry/world/blocks/logic/MemoryBlock.java
index fe74607680..84a9b208be 100644
--- a/core/src/mindustry/world/blocks/logic/MemoryBlock.java
+++ b/core/src/mindustry/world/blocks/logic/MemoryBlock.java
@@ -56,8 +56,9 @@ public class MemoryBlock extends Block{
             return accessible();
         }
 
+        @Override
         public boolean readable(LExecutor exec){
-            return exec.privileged || (this.team == exec.team && !this.block.privileged);
+            return isValid() && (exec.privileged || (this.team == exec.team && !this.block.privileged));
         }
 
         @Override
@@ -69,7 +70,7 @@ public class MemoryBlock extends Block{
 
         @Override
         public boolean writable(LExecutor exec){
-            return exec.privileged || (this.team == exec.team && !this.block.privileged);
+            return readable(exec);
         }
 
         @Override
diff --git a/core/src/mindustry/world/blocks/logic/MessageBlock.java b/core/src/mindustry/world/blocks/logic/MessageBlock.java
index 1b497fa3f3..3ccdade0d5 100644
--- a/core/src/mindustry/world/blocks/logic/MessageBlock.java
+++ b/core/src/mindustry/world/blocks/logic/MessageBlock.java
@@ -168,7 +168,7 @@ public class MessageBlock extends Block{
 
         @Override
         public boolean readable(LExecutor exec){
-            return true;
+            return isValid();
         }
 
         @Override