From 8130774537c1a9a8780686d5736a8b18cb430818 Mon Sep 17 00:00:00 2001
From: Jason Wray <jason@mapbox.com>
Date: Fri, 19 Jul 2019 12:32:28 -0700
Subject: Revert "Revert "[core][cp] Backport #15112 to mojito""

This reverts commit 4c5343ad7cf5c954a56b65cf88655383fdeb1bba.
---
 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 30b6e65f24..979cea3464 100644
--- a/src/mbgl/renderer/sources/render_custom_geometry_source.cpp
+++ b/src/mbgl/renderer/sources/render_custom_geometry_source.cpp
@@ -28,7 +28,10 @@ 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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