From 5cd8cdb56bcf50789fe98e2a056af7267c1c276b Mon Sep 17 00:00:00 2001
From: Mikhail Pozdnyakov <mikhail.pozdnyakov@mapbox.com>
Date: Fri, 12 Jul 2019 17:32:19 +0300
Subject: [core][cp] Backport #15112 to nectar

Backports #15112 to release-nectar.
---
 src/mbgl/renderer/sources/render_custom_geometry_source.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/mbgl/renderer/sources/render_custom_geometry_source.cpp b/src/mbgl/renderer/sources/render_custom_geometry_source.cpp
index 45d49ffa5b..09cba2fc30 100644
--- a/src/mbgl/renderer/sources/render_custom_geometry_source.cpp
+++ b/src/mbgl/renderer/sources/render_custom_geometry_source.cpp
@@ -25,7 +25,10 @@ void RenderCustomGeometrySource::update(Immutable<style::Source::Impl> baseImpl_
                                  const bool needsRendering,
                                  const bool needsRelayout,
                                  const TileParameters& parameters) {
-    std::swap(baseImpl, baseImpl_);
+    if (baseImpl != baseImpl_) {
+        std::swap(baseImpl, baseImpl_);
+        tilePyramid.clearAll();
+    }
 
     enabled = needsRendering;
 
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