fix double OnSnapshotReady listener invocation

GitOrigin-RevId: e4ca3efb5c4fc5d03b8842233b8449cfa6ae17e4

Author: dzinad

CHANGELOG.md

@@ -5,6 +5,8 @@ Mapbox welcomes participation and contributions from everyone.
 > **16 KB Page Size Support:** Starting with version 11.7.0 and 10.19.0, **NDK 27 is supported** with dedicated artifacts that include [support for 16 KB page sizes](https://developer.android.com/guide/practices/page-sizes). If your app does not require 16 KB page size support, you can keep using our default artifacts without `-ndk27` suffix. For more information about our NDK support, see https://docs.mapbox.com/android/maps/guides/#ndk-support
 
 # main
+## Bug fixes 🐞
+* Fix an issue where `MapView#snapshot` listener was invoked twice when the map was not ready.
 
 # 11.16.0-beta.1 September 23, 2025
 

maps-sdk/src/main/java/com/mapbox/maps/renderer/MapboxRenderer.kt

@@ -182,14 +182,15 @@ internal abstract class MapboxRenderer(mapName: String) : DelegatingMapClient {
     if (!readyForSnapshot.get()) {
       logE(TAG, "Could not take map snapshot because map is not ready yet.")
       listener.onSnapshotReady(null)
-    }
-    val legacyMode = snapshotLegacyModeEnabled
-    renderThread.queueRenderEvent(
-      RenderEvent(
-        runnable = { listener.onSnapshotReady(performSnapshot(legacyMode)) },
-        needRender = true,
+    } else {
+      val legacyMode = snapshotLegacyModeEnabled
+      renderThread.queueRenderEvent(
+        RenderEvent(
+          runnable = { listener.onSnapshotReady(performSnapshot(legacyMode)) },
+          needRender = true,
+        )
       )
-    )
+    }
   }
 
   @AnyThread

maps-sdk/src/test/java/com/mapbox/maps/renderer/MapboxRendererTest.kt

@@ -257,7 +257,7 @@ internal abstract class MapboxRendererTest {
     }
     val event = slot<RenderEvent>()
     every { renderThread.queueRenderEvent(capture(event)) } answers {
-      handler.post(event.captured.runnable!!)
+      throw AssertionError("Render event should not be queued when not ready for snapshot")
     }
     mapboxRenderer.pixelReader = pixelReader
     mapboxRenderer.readyForSnapshot = AtomicBoolean(false)