diff --git a/server/model/monitor.js b/server/model/monitor.js
index 3b8d89dd4..2719b89a0 100644
--- a/server/model/monitor.js
+++ b/server/model/monitor.js
@@ -1857,6 +1857,15 @@ class Monitor extends BeanModel {
                 }
             }
         }
+
+        if (this.type === "mongodb" && this.databaseQuery) {
+            // Validate that databaseQuery is valid JSON
+            try {
+                JSON.parse(this.databaseQuery);
+            } catch (error) {
+                throw new Error(`Invalid JSON in database query: ${error.message}`);
+            }
+        }
     }
 
     /**
diff --git a/src/pages/EditMonitor.vue b/src/pages/EditMonitor.vue
index 3e7ac832e..0759ce70e 100644
--- a/src/pages/EditMonitor.vue
+++ b/src/pages/EditMonitor.vue
@@ -2393,6 +2393,7 @@ export default {
                 confirmed: false,
                 editedValue: false,
             },
+            isLoadingMonitor: false,
         };
     },
 
@@ -2915,6 +2916,7 @@ message HealthCheckResponse {
                             }
                         }
 
+                        this.isLoadingMonitor = true;
                         this.monitor = res.monitor;
 
                         if (this.isClone) {
@@ -2958,6 +2960,11 @@ message HealthCheckResponse {
                                 this.monitor.timeout = ~~(this.monitor.interval * 8) / 10;
                             }
                         }
+
+                        // Reset loading flag after all reactive updates
+                        this.$nextTick(() => {
+                            this.isLoadingMonitor = false;
+                        });
                     } else {
                         this.$root.toastError(res.msg);
                     }
@@ -3314,8 +3321,15 @@ message HealthCheckResponse {
                 // Calculate the minimum required interval based on ping configuration
                 const calculatedPingInterval = this.calculatePingInterval();
 
-                // If the configured interval is too small, adjust it to the minimum required value
-                if (this.monitor.interval < calculatedPingInterval) {
+                // Don't auto-adjust interval when:
+                // 1. Loading monitor data from server (isLoadingMonitor flag)
+                // 2. User explicitly edited the interval value (editedValue flag)
+                // This respects the user's choice of low intervals they've confirmed
+                if (
+                    !this.isLoadingMonitor &&
+                    !this.lowIntervalConfirmation.editedValue &&
+                    this.monitor.interval < calculatedPingInterval
+                ) {
                     this.monitor.interval = calculatedPingInterval;
 
                     // Notify the user that the interval has been automatically adjusted