diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93aa9d7fb1..cebc96653f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 [Full changelog](https://github.com/mozilla/glean/compare/v66.1.0...main)
 
+* Kotlin
+  * BUGFIX: For `lateinit` metrics, check that the metric was instantiated before recording on it ([#3309](https://github.com/mozilla/glean/pull/3309))
+
 # v66.1.0 (2025-11-03)
 
 [Full changelog](https://github.com/mozilla/glean/compare/v66.0.1...v66.1.0)
diff --git a/glean-core/android/src/main/java/mozilla/telemetry/glean/private/BooleanMetricType.kt b/glean-core/android/src/main/java/mozilla/telemetry/glean/private/BooleanMetricType.kt
index 2c07973cae..b2642f0d44 100644
--- a/glean-core/android/src/main/java/mozilla/telemetry/glean/private/BooleanMetricType.kt
+++ b/glean-core/android/src/main/java/mozilla/telemetry/glean/private/BooleanMetricType.kt
@@ -37,7 +37,9 @@ class BooleanMetricType {
      */
     fun set(value: Boolean) {
         Dispatchers.Delayed.launch {
-            inner.set(value)
+            if (this::inner.isInitialized) {
+                inner.set(value)
+            }
         }
     }
 
diff --git a/glean-core/android/src/main/java/mozilla/telemetry/glean/private/CounterMetricType.kt b/glean-core/android/src/main/java/mozilla/telemetry/glean/private/CounterMetricType.kt
index fee038c709..3c6237f12b 100644
--- a/glean-core/android/src/main/java/mozilla/telemetry/glean/private/CounterMetricType.kt
+++ b/glean-core/android/src/main/java/mozilla/telemetry/glean/private/CounterMetricType.kt
@@ -38,7 +38,9 @@ class CounterMetricType {
      */
     fun add(amount: Int = 1) {
         Dispatchers.Delayed.launch {
-            inner.add(amount)
+            if (this::inner.isInitialized) {
+                inner.add(amount)
+            }
         }
     }
 
diff --git a/glean-core/android/src/main/java/mozilla/telemetry/glean/private/QuantityMetricType.kt b/glean-core/android/src/main/java/mozilla/telemetry/glean/private/QuantityMetricType.kt
index f05a8ee7a2..7ed057ca57 100644
--- a/glean-core/android/src/main/java/mozilla/telemetry/glean/private/QuantityMetricType.kt
+++ b/glean-core/android/src/main/java/mozilla/telemetry/glean/private/QuantityMetricType.kt
@@ -37,7 +37,9 @@ class QuantityMetricType {
      */
     fun set(value: Long) {
         Dispatchers.Delayed.launch {
-            inner.set(value)
+            if (this::inner.isInitialized) {
+                inner.set(value)
+            }
         }
     }
 
diff --git a/glean-core/android/src/main/java/mozilla/telemetry/glean/private/StringMetricType.kt b/glean-core/android/src/main/java/mozilla/telemetry/glean/private/StringMetricType.kt
index 8fbc887f32..de1a3aee99 100644
--- a/glean-core/android/src/main/java/mozilla/telemetry/glean/private/StringMetricType.kt
+++ b/glean-core/android/src/main/java/mozilla/telemetry/glean/private/StringMetricType.kt
@@ -38,7 +38,9 @@ class StringMetricType {
      */
     fun set(value: String) {
         Dispatchers.Delayed.launch {
-            inner.set(value)
+            if (this::inner.isInitialized) {
+                inner.set(value)
+            }
         }
     }