diff --git a/packages/core/repl.mjs b/packages/core/repl.mjs
index 2133c559..aa8762d8 100644
--- a/packages/core/repl.mjs
+++ b/packages/core/repl.mjs
@@ -16,7 +16,7 @@ export function repl({
   onToggle,
   editPattern,
   onUpdateState,
-  sync = true,
+  sync = false,
 }) {
   const state = {
     schedulerError: undefined,