diff --git a/packages/metro-source-map/src/generateFunctionMap.js b/packages/metro-source-map/src/generateFunctionMap.js
index 3e6e980bb7..7c7578a4e6 100644
--- a/packages/metro-source-map/src/generateFunctionMap.js
+++ b/packages/metro-source-map/src/generateFunctionMap.js
@@ -224,17 +224,15 @@ function forEachMapping(
   // values missing the `hub` property needed by Babel transformation, so we
   // save, clear, and restore the cache around our traversal.
   // See: https://github.com/facebook/metro/pull/854#issuecomment-1336499395
-  const previousCache = traverse.cache.path;
-  traverse.cache.clearPath();
-  traverse(ast, {
+  // @nocommit TODO: comment to the comment above ^ in the OS PR and update the comment above
+  const shallowCopiedAST = {...ast};
+  traverse(shallowCopiedAST, {
     // Our visitor doesn't care about scope
     noScope: true,
-
     Function: visitor,
     Program: visitor,
     Class: visitor,
   });
-  traverse.cache.path = previousCache;
 }
 
 const ANONYMOUS_NAME = '<anonymous>';