diff --git a/FAQ.md b/FAQ.md
index 0cc1d92..ec57e6e 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -1195,6 +1195,8 @@ It is also possible that your WAF blocks certain requests, e.g. `GET`.
 > RustDesk: It is quite strange, I can see your build is successful on our side. But you failed to query the status. Could you try to build a macOS custom client? If the same issue?
 >
 > User: It is now ok in another browser and device.
+>
+> Conclusion: it seems `React` does not work well on some browsers. Refresing browser might also skip "Build timeout" error for this case.