diff --git a/client/utils/hookConsoleSync.js b/client/utils/hookConsoleSync.js
new file mode 100644
index 0000000000..3aeacf06a6
--- /dev/null
+++ b/client/utils/hookConsoleSync.js
@@ -0,0 +1,21 @@
+import parse from 'console-feed/lib/Hook/parse';
+import methods from 'console-feed/lib/definitions/Methods';
+import { Encode } from 'console-feed';
+
+/**
+ * Synchronous replacement for console-feed's Hook. Encodes function
+ * arguments immediately, so the values of mutable arguments are
+ * captured accurately.
+ *
+ * (See https://github.com/samdenty/console-feed/pull/77.)
+ */
+export default function hookConsoleSync(targetConsole, callback) {
+  methods.forEach((method) => {
+    const native = targetConsole[method];
+    targetConsole[method] = function patched(...args) {
+      native.apply(this, args);
+      const parsed = parse(method, args);
+      if (parsed) callback(Encode(parsed));
+    };
+  });
+}
diff --git a/client/utils/previewEntry.js b/client/utils/previewEntry.js
index 0d369788c3..504cd72b05 100644
--- a/client/utils/previewEntry.js
+++ b/client/utils/previewEntry.js
@@ -1,6 +1,7 @@
-import { Hook, Decode, Encode } from 'console-feed';
+import { Decode, Encode } from 'console-feed';
 import StackTrace from 'stacktrace-js';
 import { evaluateExpression } from './evaluateExpression';
+import hookConsoleSync from './hookConsoleSync';
 
 // should postMessage user the dispatcher? does the parent window need to
 // be registered as a frame? or a just a listener?
@@ -56,7 +57,7 @@ window.loopProtect = {
 
 const consoleBuffer = [];
 const LOGWAIT = 500;
-Hook(window.console, (log) => {
+hookConsoleSync(window.console, (log) => {
   consoleBuffer.push({
     log
   });