diff --git a/core/src/mindustry/core/Logic.java b/core/src/mindustry/core/Logic.java
index 1f84613165..94b893d9da 100644
--- a/core/src/mindustry/core/Logic.java
+++ b/core/src/mindustry/core/Logic.java
@@ -387,6 +387,10 @@ public class Logic implements ApplicationListener{
         while(node != null){
             node.content.unlock();
             node = node.parent;
+
+            if((node.content instanceof Item item && state.rules.hiddenBuildItems.contains(item))){
+                break;
+            }
         }
 
         state.rules.researched.add(u.name);
diff --git a/gradle.properties b/gradle.properties
index dbc8a863d9..98272271fd 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -25,4 +25,4 @@ org.gradle.caching=true
 #used for slow jitpack builds; TODO see if this actually works
 org.gradle.internal.http.socketTimeout=100000
 org.gradle.internal.http.connectionTimeout=100000
-archash=7c34a324fd
+archash=b32576ca09