diff --git a/atom/browser/atom_browser_main_parts.cc b/atom/browser/atom_browser_main_parts.cc
index 30d096063ed..d31b54bc462 100644
--- a/atom/browser/atom_browser_main_parts.cc
+++ b/atom/browser/atom_browser_main_parts.cc
@@ -211,6 +211,12 @@ void AtomBrowserMainParts::InitializeFeatureList() {
   // Chromium drops support for the old sandbox implmentation.
   disable_features += std::string(",") + features::kMacV2Sandbox.name;
 #endif
+  // Disable creation of spare renderer process with site-per-process mode,
+  // it interferes with our process preference tracking for non sandboxed mode.
+  // Can be reenabled when our site instance policy is aligned with chromium
+  // when node integration is enabled.
+  disable_features +=
+      std::string(",") + features::kSpareRendererForSitePerProcess.name;
   auto feature_list = std::make_unique<base::FeatureList>();
   feature_list->InitializeFromCommandLine(enable_features, disable_features);
   base::FeatureList::SetInstance(std::move(feature_list));