fix: maintenance heredity

server/model/monitor.js

@@ -1371,11 +1371,11 @@ class Monitor extends BeanModel {
             if (maintenance && await maintenance.isUnderMaintenance()) {
                 return true;
             }
+        }
 
-            const parent = await Monitor.getParent(monitorID);
+        const parent = await Monitor.getParent(monitorID);
-            if (parent != null) {
+        if (parent != null) {
-                return await Monitor.isUnderMaintenance(parent.id);
+            return await Monitor.isUnderMaintenance(parent.id);
-            }
         }
 
         return false;