diff --git a/src/libANGLE/renderer/gl/BlitGL.cpp b/src/libANGLE/renderer/gl/BlitGL.cpp
index 154be25ec1..203cc01b5b 100644
--- a/src/libANGLE/renderer/gl/BlitGL.cpp
+++ b/src/libANGLE/renderer/gl/BlitGL.cpp
@@ -162,6 +162,11 @@ angle::Result SetClearState(StateManagerGL *stateManager,
     }
 
     stateManager->setScissorTestEnabled(false);
+    // When GL_RASTERIZER_DISCARD is enabled the native driver ignores glClear /
+    // glClearBuffer* (GL ES 3.x §2.14), so the robust-resource-init clear becomes
+    // a no-op and uninitialized GPU memory is exposed. Force it off here, mirroring
+    // ScopedGLState::enter().
+    stateManager->setRasterizerDiscardEnabled(false);
 
     return angle::Result::Continue;
 }